Uh oh! Your hero washed up on the beach! A common occurrence, but now the question must be what awakens him.
1. Beautiful girl
2. Hermit
3. Seemingly misanthropic philosopher
4. Prince (disguised)
5. Rival (if hero does not have a rival, now he does)
6. Sounds of battle
7. A strange ship (marine, air, or space)
8. Grandfather's ghost
9. Monster
10. Scavenger (rat person if available)
11. Mysterious item that somehow came into his possession while the ship was breaking up
12. Homely girl
Goodness, that's a number of options suited for being picked by use of a chance-based determination mechanism! I sure hope not everything in your story is like that!