1. Take away all his bottles of alcohol and drain them in the quarry and give them back to him empty In boxes for his birthday.
2. Say that Elena is making out with stefan in your bedroom right now.
3. Steal his blue Chevy and drive away and drive it off the bridge.
4. Replace all his clothes with elijahs suits.
5. Replace all his music with classical music.
6. Tell him Elena wants to break up with him.
7. Tell him that Enzo died again along with stefan
8. Put vervain in his bathtub water.
9. Replace all his stuff with pink fluffy girly things
10. Tell him Elena and Stefan are running away together to somewhere majestic.