This list has evolved over the last 20 years, but here is the current status.
1. Run a marathon. 2. Run a second marathon. 3. Walk a marathon with my wife. 4. See a practice round at the Masters and walk and experience Augusta National. 5. Jump out of an airplane. 6. Scuba dive in the Great Barrier Reef or Caribbean. 7. Go to Rome. 8. Run a third marathon.
(No. 4 (Augusta) was completed this week and it was worth the effort. Pictures below.)