Some people just ooze happiness: They always seem to be smiling and having fun, and let negative emotions and experiences roll off their backs. But if you think there's no way you could possibly ever be that way, you're wrong. Science proves that you do have the power to change your outlook on life. And it isn't hard, either: Most of the tips that follow are as simple as cracking a smile once in a while (yes, that's one of the tips). Here's to a happier you!

Exercise

Getting your blood pumping releases endorphins throughout your whole body, creating feelings of happiness that combat a bad mood. Studies have even shown that exercise can help alleviate symptoms of depression. Any physical activity counts—running, indoor cycling, yoga, dancing—as long as you break a sweat. Even a brisk 20- to 30-minute walk will help.

Flow through some yoga

When you start to see red, you might want to take a moment and flow through a sun salutation or two. Yoga can help ease depressive symptoms as well as anxiety, allowing you to slow down and focus on your breathing rather than your worries, frustrations, and problems. Try this calming yoga sequence from Kristin McGee, Health's contributing fitness editor.

Load up on leafy greens

Dark, leafy greens such as spinach and kale are rich in folate, providing 33% of the recommended daily allowance (RDA). This nutrient is linked to a decrease in negative moods and depression because it helps produce dopamine in the brain. One 2012 study found that middle-aged people who consumed the most folate had a lower risk of depression symptoms than those who ate the least.

Try cognitive behavioral therapy

Cognitive behavioral therapy (CBT) is a proven treatment for clinical depression and anxiety disorders, and it can also help anybody who simply needs to learn how to combat negative thoughts. CBT helps patients recognize and then reverse harmful thought patterns by testing their validity and then replacing them with positive ones, leaving them happier, healthier, and in a better mood.

Buy flowers for yourself

A team of Harvard researchers found that keeping fresh flowers at home does

Photos: Q&A: Do you have a happy brain? Photos: Q&A: Do you have a happy brain? Who doesn't want to be happy? – As research into our mysterious gray matter continues to explode, scientists are getting ever closer to understanding what creates a calm, contented and happy brain. Answer these eight questions to see whether your brain is wired to be happy or if you might need to practice positivity. Hide Caption 1 of 9 Photos: Q&A: Do you have a happy brain? Q: Which picture appeals to you the most? –

A: If you picked the kitten or pup, your brain may be wired to be happy. A: If you picked the kitten or pup, your brain may be wired to be happy. Studies show that people who have happy brains respond more to positive things than negative or neutral ones. Hide Caption 2 of 9 Photos: Q&A: Do you have a happy brain? Q: Which picture is most positive? –

A: All of them. They all have positive elements. No one is hurt, and everyone has access to help. Happy people, according to A: All of them. They all have positive elements. No one is hurt, and everyone has access to help. Happy people, according to happiness researcher and author Rick Hanson , look for the positives in each experience and try to hold on to those. Hide Caption 3 of 9 Photos: Q&A: Do you have a happy brain? Q: Which of these is critical to your happiness? –

A: None of them. Happiness researcher Sonja Lyubomirsky says that although all of these can contribute to contentment, they are also part of A: None of them. Happiness researcher Sonja Lyubomirsky says that although all of these can contribute to contentment, they are also part of The Myths of Happiness . She defines those as "myths that assure us that lifelong happiness will be attained once we hit the culturally confirmed markers of adult success. This restricted view of happiness works to discourage us from recognizing the upside of any negative life turn and blocks us from recognizing our own growth potential." Hide Caption 4 of 9 Photos: Q&A: Do you have a happy brain? Q: What can you practice to be happier? –

A: All of them. A: All of them. Studies tell us that writing down what we are grateful for several times a week, laughing and surrounding ourselves with positive, nurturing relationships and looking for the positive as often as possible are great ways to boost mood. Hide Caption 5 of 9 Photos: Q&A: Do you have a happy brain? Q: At which age are you most likely to be happy? –

A: Old age. While A: Old age. While most people believe happiness declines with age, studies show that's not true. A large Gallup poll found 85-year-olds to be more satisfied with themselves than 18-year-olds, and another study found that happiness and enjoyment dip in middle age and rise again in old age. Hide Caption 6 of 9 Photos: Q&A: Do you have a happy brain? Q: Which experiences will make you happiest? –

A: It depends on A: It depends on your age . Younger people gain more happiness from uncommon, extraordinary experiences, while older people savor simple, ordinary experiences that fill up daily life. Hide Caption 7 of 9 Photos: Q&A: Do you have a happy brain? Q: Which of these purchases might make you happiest? –

A: Family games and traveling. A: Family games and traveling. Studies show that spending on meaningful activities that bring us closer to family and friends or boost self-confidence makes us the happiest, such as sharing travel experiences, playing board games or learning musical instruments. Hide Caption 8 of 9 Photos: Q&A: Do you have a happy brain? Q: Which activity could train your brain to be happy? –

A: All of them. In fact, happy brain expert A: All of them. In fact, happy brain expert Dr. Richard Davidson says his data show that if a person sits quietly and thinks about kindness and compassion for a half-hour a day, their brain will show noticeable changes in just two weeks. Hide Caption 9 of 9

wonders in keeping away anxiety and negative moods. People in the study also felt more compassionate toward others and they felt a boost of energy and enthusiasm at work.

Smile

While you may think of smiling as a reaction to feeling happy, some researchers suggest that smiling can also lead to joy. The simple act of smiling—even if you have to force it—might help to activate the happiness centers in your brain, leaving you in a better mood.

Turn on a light box

Light therapy is an effective treatment for seasonal affective disorder (SAD), but experts agree that it works to treat symptoms of major depressive disorder as well. Feeling blue? You can turn on a light box for 30 minutes to an hour when you're down, but to feel its full effects, use it as part of a daily therapy routine.

Open the shades

If you don't have access to a light box, the simple act of letting in some sunlight can brighten your mood. When your workspace or living area is brighter, you tend to feel happier too.

Go outside

Starting to feel down? Head outside to soak up some sunshine. The human body produces vitamin D when exposed to the sun's rays, and research suggests that people who are deficient in the vitamin are more likely to be depressed, anxious, and tired. Step into the sunshine for 20 to 25 minutes of sunlight to lighten your mood naturally.

Eat some 'shrooms

A surprising source of vitamin D? Mushrooms. The tasty vegetable is the only plant source of natural vitamin D, and foods that contain vitamin D boost serotonin in the brain, putting you in a better mood. It's easy to increase your intake of vitamin D this way—throw some mushrooms into your breakfast omelets or lunchtime salads.

Try meditation

Good news: Meditation is a proven stress-buster with no harmful side effects. Studies have shown that its benefits range from pain reduction and lower blood pressure to a boost in libido. Best part? It releases "happy" chemicals in the brain—serotonin, dopamine, and endorphins—all of which work together to put you in a better mood. If you don't know where to start, try a guided meditation to de-stress or start your morning.

Smell the oranges

Citrus scents, such as orange, lemon, and grapefruit bring out positive chemical reactions in your brain as well as work to ease stress. If you want to feel uplifted, use a few drops of citrus essential oil on your pressure points. You can also mix the scent with a floral aroma such as jasmine to increase the positive effects.

Eat carbs as an afternoon snack

You know that afternoon mood slump that hits at just the worst time? Well, it turns out that you can eat your way to a happier, more energized afternoon—carbs. For years we've been hearing that we should avoid carbs, but in reality, a low-carb diet can make us feel sad and stressed. Carbohydrates actually boost mood-boosting chemicals in the brain. But let's get something straight here—we want to focus on healthy, whole-grain sources instead of refined carbohydrates to reap the benefits. When you begin to feel down, go for an afternoon snack of 25 to 30 grams of carbs, such as a three-quarter-cup serving of Cheerios.

Play with your pet

Having a dog or cat can seriously improve your quality of life—their excitement in seeing you come home and their unyielding loyalty make them great companions. There are a host of reasons why pets improve your health, but they can turn around a bad mood and make you happier in no time. A study found that petting a dog for only 15 minutes releases serotonin, prolactin, and oxytocin—all of which are mood-enhancing hormones, while lowering the stress hormone cortisol.

Take microbreaks

Research shows that people who take quick breaks during their workday to watch funny videos online get a high emotional payoff and report feeling more energetic and happy with fewer negative emotions. Not only will this improve your mental health overall; this is an easy way to turn around a bad mood in less than a minute—plus, you can get a metabolism boost, too!

Add turmeric to your meal

The active compound in turmeric, curcumin, has natural antidepressant qualities. You may already be adding turmeric to your meals because of its vast whole-body health benefits, such as lessening the effects of rheumatoid arthritis, osteoarthritis, and other inflammatory conditions, as well as fighting Alzheimer's disease and diabetes. Animal studies have also linked curcumin to an increase in serotonin and dopamine, so it's a powerful way to boost your mood.

Listen to music...

Have you ever heard a song over the radio that just felt good? Or have you turned on an old CD only to find a flood of happy memories come streaming back? Well, that's due to the fact that music is a mood-booster. It releases the feel-good chemical dopamine into your system and brings on nostalgia.

...And sing along

You can also get happy by making your own music—by singing. University of Manchester researchers discovered that a tiny organ in the inner ear (called the sacculus) is connected to a part of your brain that registers pleasure. The sacculus registers frequency notes that are associated with singing almost instantly, giving you a warm and fuzzy feeling. So go ahead and sing in the shower, belt it out in your car, or get up on that karaoke stage.

Eat chocolate (yes!)

While you might not need another excuse to eat more chocolate, here's another: It makes us happier. Chocolate contains tryptophan, which boosts the production of serotonin in the brain, leading to better moods. This trick also works with other foods containing tryptophan, such as poultry and eggs.

Drink coffee

This morning energy boost doubles as a mood pick-me-up. A Harvard University study found that women who drank at least two cups of coffee regularly were at a 15% lower risk of depression than women who did not. Just keep in mind that those fancy coffee drinks can have tons of hidden sugar and calories, so it's best to stick with black coffee (and some skim milk).

Sip on some green tea

Green tea already boasts an impressive résumé of health benefits. Thanks to the polyphenols it contains, green tea helps with weight loss by boosting metabolism, as well as providing a reduced risk of heart disease, high blood pressure, certain cancers, and osteoporosis. But for your mood? Green tea has been shown to reduce stress levels. A study found that people who drank five or more cups of green tea per day had a 20% lower level of stress than those who drank less than one.

Make a human connection

Put down your smartphone and take a step back from your computer screen. If you want to feel better—and fast—go to a friend or family member for some relief. A study from the University of North Carolina at Chapel Hill found that human touch releases those feel-good chemicals like serotonin, as well as reduces blood pressure and heart rate making you feel more relaxed.

Consume healthy fats

You know how avocados are some of the most pleasurable foods to eat, with their rich taste and smooth, decadent texture? That's a mood-booster on its own, but research also suggests that their fat content is also the reason why they better our mood. Because fat slows digestion, it evens our blood sugar levels leaving us to feel calm and satisfied. So go ahead and treat yourself to some avocado or nuts next time you're feeling anxious.

Eat more salmon

Fatty fish like salmon is high in omega-3 fatty acids, which can help stave off depression (omega-3s are also present in avocados and nuts, as well as grass-fed beef and chicken). This is because they help to maintain brain function in the areas that regulate mood and emotion—a study found that women who hate fish two times per week had a 25% lower risk of depression than women who ate it less often. If you don't like to eat fish, try taking omega-3 fish oil supplements instead.

Try St. John's wort

This herbal supplement is one of the most-studied herbal supplements for depression, and research shows that it may be as beneficial as antidepressants when treating mild depression. While it may seem like a no-brainer, St. John's wort has known serious drug interactions, including reducing the effectiveness of birth control. Additionally, when taken in conjunction with antidepressants, the supplement can create too-high levels of serotonin, which can lead to heart problems. So before you try this one, be sure to check in with your doctor.