30 things you should know by 30

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2. That there's a difference between love and lust.

3. That sometimes sleeping in (and sleeping alone) is the ultimate luxury.

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5. How to get ready to go out in less than 20 minutes.

6. That the dishes can wait. (But not forever.)

7. That time really does move faster as you get older.

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9. How to dine out alone—and truly enjoy it.

10. How to change your oil. (Or just the fact that your oil needs changing.)

11. How to live without a credit card.

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14. How to make the most of your vacation days.

15. How to sign up for a cell-phone plan/pick a data package/buy a car without getting fleeced.

16. What a retirement plan is, and how to make sure you're setting aside enough.

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19. That sometimes nothing feels as good as being carded.

20. How to tell a couple good, non-dirty jokes. (You never know when you'll need an icebreaker.)

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22. How to put someone else first.

23. How to agree to disagree—and really mean it.

24. That your family baggage is too heavy to keep carrying around.

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26. That certain fashion trends aren't worth trying… ever. (Harem pants, we're looking at you.)

27. That you're either a person who can wear bangs, or you're not.

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29. That changing your mind doesn't mean you're inconsistent: It just means you're smart enough to know that our views and opinions evolve.

30. That someone will always be prettier or younger or smarter or more successful. But no one else will ever be quite the same combination of those things that you are.