Sail across the Atlantic (I've done this. Its an experience, and was both boring and thrilling, at different times)
Bungee jump
Parachute jump
Abseil (great fun)
Track day in a car you can't afford
Kitesurf (I can help you with this, I'm an instructor)
Surf (great fun)
Get arrested (not fun)
Visit all 7 continents of the world (I've only got Antartica to go)
I've still got 6 1/2 years to do the ones I haven't done