1. Listing your age as 99 years old on Myspace.

2. Wearing shutter shades.

Leon Neal / AFP / Getty Images

3. Being *invested* in this relationship.

Evan Agostini / Getty Images

4. Thinking they were going *to last.*

Pascal Le Segretain / Getty Images

5. Having a Blackberry and saying you “couldn’t live” without it.

Justin Sullivan / Getty Images

7. Carrying an iPod and your phone because you needed two devices to play music.

9. …and of course, recording your ringtone off the radio.

10. Yelling “Don’t tase me, bro!” whenever you goofed around with your friends.

11. Hating on Twilight books.

12. Feeling like an insider ‘cause you watched Myspace Secret Shows.

13. Teen pregnancy, in general.

Fox Searchlight

14. The Black Eyed Peas, in general.

Frazer Harrison / Getty Images

15. Mailing Netflix envelopes.

16. Singing this song:

Fearless

18. Wanting a white Macbook…

19. …and then spending hours playing with Photo Booth.

20. Rating YouTube videos with stars.

21. Appropriating keffiyeh scarves (that you bought at Urban).

23. The Secret.

Atria Books

25. Emailing Rickrolling videos to your friends — ‘cause LOL.

Sony Music

26. Trying to figure out who the fuck was Gossip Girl.

Andrew Eccles / THE CW

27. Taking selfies in front of a mirror with an actual camera.

28. Clothing with skulls.

29. Being the first person to write on your friend’s Facebook Wall…

30. …and also sending them virtual gifts.

33. Making Facebook groups for lost phones.

34. Making your best friends your siblings.

35. And, of course, having “poking wars” for absolutely no reason.

Facebook