You could...
1. Be eaten by a tree.
2. Look for firewood in Fangorn Forest.
3. Protect Osgiliath.
4. Be Denethor's son.
5. Get lost in the Dead Marshes.
6. Sneak up on Legolas.
7. Be trampled by an Oliphant.
8. Fall off your boat.
9. Look like an Orc.
10. Smell like an Orc.
11. Act like an Orc.
12. Be an Orc.
13. Carry the One Ring.
14. Mess up Legolas' hair.
15. Breathe loudly in Lothlorien.
16. Be the gate keeper at Bree.
17. Take a bath in the Dead Marshes.
18. Be a battle horse from Rohan.
19. Have Saruman twirl you around in the air.
20. Explore nasty dark caves.
21. Be fresh in front of Orcs.
22. Be fresh with Orcs.
23. Be a Fool of a Took.
24. Trip and fall down some stony steps.
25. Hide Legolas' brush.
26. Play with Gandalf's fireworks.
27. Stand in the middle of the bridge of Kazad-dum and tell a Balrog he cannot pass.
28. Insult Sam's cooking.
29. Sneak up on Aragorn while being dressed as a Ringwraith.
30. Use the Palantir as a bowling ball.
31. Steal Legolas' shampoo.
32. Cut down one of Treebeard's friends.
33. Trust Gollum to lead you to safety.
34. Have your horse fall on you.
35. Jump off the top of Orthanc when there's no eagle below to catch you.
36. Say "My Preciousss" to the One Ring when Gollum is behind you.
37. Tell Denethor to eat properly.
38. Toss the dwarf.
39. Fall off the brigde of Kazad-dum while running.
40. Die of old age.
41. Fry fish in front of Gollum.
42. Do a happy dance in Mount Doom.
43. Attempt to flip onto a horse if you're not an Elf.
44. Laugh at a Ringwraith and don't run away.
45. Sneeze while hiding from a Ringwraith.
46. Tell Treebeard that you are a little Orc.
47. Tell blonde jokes in Lothlorien.
48. Accuse Sam of stealing the Lembas.
49. Be near Aragorn when he wakes up from a bad dream.
50. Marry Pippin then tell him you hate mushrooms.
51. Tell Sauron he over-plucked his eye.
52. Go to the Black Gate of Mordor and when they open, yell "Trick or Treat!!!"