If you ever needed any motivation to get moving in 2020, meet Matt Jurd.

The father of three is a shadow of his former self after shedding 78 kilograms since the start of the year.

"My initial goal was, I wonder how good I can look at Christmas because you sort of get used to just being big and it's a weight physically and it's a burden," he told A Current Affair.

Matt Jurd's been on an incredible weight loss journey. (A Current Affair)

At the start of 2019, Matt weight 170kg and wore a size 8XL.

Even everyday tasks could be challenging, so he was determined to make a change.

"You've just got to change portion sizes and choose better eating habits," he said.

"I found that structured feasting and intermittent fasting for me have been really beneficial."

Matt has lost an incredible 78kg. (A Current Affair)

Now, Matt's meals consist of a shake at 10am, a snack at noon, a second shake at 3pm, a second snack and 4pm, and dinner at 6.30pm.

He said he saw the switch to a shake-based diet as a lifestyle change rather than a diet.

"I think if your brain doesn't come with what you're going to do, then you're sort of setting yourself up to fail," he said.

Matt is now hitting the gym. (A Current Affair)

"You need your head in the game as well."

Sheridan Johnson, meanwhile, has undertaken a different kind of dietary struggle.

She told A Current Affair that she used to drink about a bottle of wine a night, but to date she hasn't had a drop for more than a year.

Matt has switched to a shake-based diet. (A Current Affair)

"I think there's so much pressure for us to be drinking, especially at this time of year," she said.

"You just continually drink more and more and then you realise, well, that's probably not normal."

She discovered Daybreak, an alcohol support app by Hello Sunday Morning, and she hasn't looked back.

Sheridan has managed to curb her drinking. (A Current Affair)

"I think people need to have some support around them, because it's hard enough with everyone else drinking and you not," she said.

"I say give it a go. You feel better, your wallet's fatter, and you feel much healthier."

Tradie Sam Bate has spent 2019 taking control of his finances, managing to save almost $40,000 this year alone.

Tradie Sam has saved nearly $40,000 this year. (A Current Affair)

"All you do is put in a weekly deposit and it saves it for you," he said.

"You can't touch it unless you want to pull it out in a few days' time, but it's an easy way to separate yourself from the money."

Sam's reached his savings goal with the help of a new finance app called Raiz, which allows users to pick a level of investment risk, before giving them a cut of any profits.

Psychologist Patrea O'Donoghue said most people struggled to stick to their New Year's resolutions.

She said it took 66 days to form a habit, so patience and persistence were key.

"Small, consistent action regularly, rather than trying to do that binge-process, because the consistency of the habit is certainly going to make it more likely they'll stick with it."

People are advised to consult their doctor before undertaking any major lifestyle change.

Find out more about the Man Shake, Raiz Invest, or Daybreak at their respective websites.