I have a lot. But here are a few:

Try to bat against a major league pitcher.
Try to tackle a NFL running back in full pads.
Climb all the 14ers in Colorado.
Own a super car (Saleen S7, Ferrari 360, etc).
Visit all 7 continents.
Live in Europe for a year (Maybe Germany?)
Ride the entire Tour de France route one summer.

I have a zillion others, these are at the top though.