21 is a big birthday. A birthday that brings about a whole new world of freedoms. A birthday that makes some feel old, while others still feel carefree and young. Either way, you're officially an adult now, according to society. You can vote, you drive, you can sign up for the army and now, you can legally drink.

Here are 21 things we should all know before turning 21:

1. Make time for yourself.

2. Nobody owes you anything -- work for what you want.

3. Family first. Always.

4. Don't assume you need to have it all together.

5. It's okay if you're not still friends with everyone from high school.

6. Don't be afraid to ask for help.

7. Go outside your comfort zone.

8. Know how to cook -- mac and cheese does count!

9. It's okay to be irresponsible...sometimes.

10. But you also have to be responsible.

11. Enjoy expensive alcohol sometimes -- trust me, your hangover will thank you.

12. There is more to someone than their Instagram -- stop comparing lives.

13. Laugh at yourself -- life is too short.

14. How to say "no."

15. Drink a ridiculous amount of water -- your future self will thank you.

16. Stick with one kind of drink every time you drink.

17. Stop worrying about the future.

18. Saving money may suck, but in the end it's a good decision.

19. Know your limits -- with love, with alcohol, with friends.

20. Jump at every chance to travel -- whether it's five hours or 15.

21. Have fun!