This keyword phrase is searched for quite a lot on the site, so I thought I would think up 21 things to do. Here is what I came up with, so if you ever ask yourself 'What can I do for my 21st birthday?' read on:

1. Throw a party
2. Go to a nightclub
3. Get driven around in a stretch limousine
4. Have a champagne flight on the London Eye
5. Go for a meal with your family or friends
6. Go on a hot air balloon ride
7. Go paintballing with your friends
8. Speak to your parents about the day you were born
9. Find out what song was number one in the charts
10. Go shopping
11. Buy a newspaper from your date of birth
12. Have a massage or spa day
13. Have a makeover/photoshoot day
14. Go to a swanky casino
15. Go to London's west end to see a musical
16. Race around the track in a Ferrari or Aston Martin
17. Travel to a theme park you have never been to
18. Go ape!
19. Go on a champagne or wine tasting day
20. Go to the cinema
21. Go bowling