Turning 30 may feel like a lifetime away when you're enjoying your carefree 20s - but time catches up with you sooner than you think.

In a new thread on Reddit, older users have been preparing younger members of the forum for hitting the big three-oh.

Redditor kyle768 took to the site to ask: 'What should one do in their 20s to avoid regrets in their 30s and 40s?'

It wasn't long before seasoned users came forward with sage advice for their younger counterparts in a thread that topped 10,000 comments - from investing their money to deleting cringeworthy social media posts.

Reddit users have been trying to prepare twenty-somethings for the shock of hitting 30

Most of the older users warned them that they should start taking better care of their health before they get older.

One user said: 'Create some crucial healthy habits like exercising, meditating, saving money, etc. Habits made early tend to stick to you for life and by the time when you're in your 30s or 40s, you're already on auto-pilot.'

'Don't drink too much. Use condoms. Start working out and eating healthy now,' another chimed in.

One user advised people to 'quit smoking' while someone else said to 'wear sunscreen'. They posted: 'Your skin will stay good. It doesn't magically rebound on its own.'

The thread warned twenty-somethings to get healthy while they're still very young

A lot of people also gave romantic advice, with one person even giving tips on how to choose your future spouse.

'Choose a partner with whom you connect on an emotional level and share similar interests and most importantly have similar financial and personal goals,' they said.

'Looks and passion fade over time and these attributes have never carried a relationship through rough waters.'

Another had more succinct advice, posting simply: 'Just ask her out, man.'

The group also told people to take chances with romance and how to find the perfect partner

Social media should also be closely guarded according to the thread with one person posting: 'Clear their social media of pictures from their teen years.'

Many people also advised twenty-somethings to save and sort out their finances before hitting 30.

'Start investing. Even if it is just a small percent of your income each month. If you have any sort of available funds just sitting in your bank account, truly consider it,' one said.