Already completed:
- sky dive
- snorkel
- snowboard
- see the Grand Canyon
- go to Alaska and see the glaciers
- rock climb
- ride in a helicopter
- go whale watching
- "Do" Vegas (est. date of completion: Sept. 2012) :)
- learn to drive stick shift
- tour Europe
- ice skate at Rockefellar Center at xmas time
- swim with dolphins
- go on a medical mission
- run a half marathon
- kiss in a summer rainstorm
- learn to surf and/or water ski
- scuba dive (in the Barrier Reef)
- ride a motorcycle
- be a mom
- see the northern lights
- jump off a cliff into deep water
That's all I've got so far, but I'm sure the list will grow (and hopefully so will the completed list!)