I know everyone's doing these now, and it's far from original, but here are the things I'd like to do before I bite the big one... (in no particular order)
1. Visit Australia
2. See a volcano
3. Drive across the United States.
4. Protest at a rally
5. Record a CD
6. Donate bone marrow
7. Make it to all 7 continents
8. See the pyramids in Egypt
9. Climb a mountain
10. Write a book
11. Have my picture taken with a celebrity
12. Attend a live taping of a TV show
13. See the Amazon Rainforest
14. Perform jury duty
15. Tour NASA/ Meet an astronaut
16. Hike the entire Appalacian Trail
17. Shave my head
18. Get a tattoo
19. Visit all 50 states
20. Attend a film festival
21. Go skydiving
22. See a solar eclipse
23. Perform comedy in front of an audience
24. Perform music in front of an audience
25. Get a trophy for doing something athletic
26. Learn a martial art, and get a black-belt
27. Get a SCUBA certification
28. Swim with sharks
29. See the Seven New World Wonders (Machu Pichu, Peru; Taj Mahal, India; Great Wall, China; Petra, Jordan; Colisseum, Rome; Christ Redeemer, Brazil; Chichen Itza, Mexico)
30. Walk across the Golden Gate Bridge
31. Walk across the Brooklyn Bridge
32. Walk across the Woodrow Wilson Bridge
33. Stand at the Four Corners Monument (Utah, Colorado, New Mexico, Arizona)
34. Ride a donkey down the Grand Canyon
35. See and photograph the Aurora Borealis
36. Go on a Safari in Africa
37. Go to the Galapagos Islands
38. Visit Komodo Island, Indonesia
39. Milk venom from a poisonous snake
40. Go on a Buddhist trip to Tibet
41. Go on a trip to Israel
42. See Pompeii
43. Visit Stonehenge
44. See Easter Islands
45. Get to meet a musician backstage
46. Kiss the Blarney Stone
47. Chase and photograph a tornado
48. Walk on hot coals
49. Photograph lightning
50. Join the mile-high club. Again.
This short list was actually really difficult to come up with , as there are so many things that I've already experienced (Sunset on the Pacific coast, fly in a helicopter, kiss at the Eiffel Tower, live in Europe, join the Army, Sunrise on the beach, etc.)