Read only the books with the best covers.
Walk around your town late at night, trying to get lost.
Rearrange your living room without telling your parents.
Act surprised when they find out. (see above)
Make a case study of a close friend.
Get a job or have a job get you.
Try new food combinations.
Hold a one person taste test.
Start quoting a movie in normal conversation and see if anyone notices.
Pretend that someone is dead.
Start a cult.
Make a bet that you can go longer without talking than someone else.
Debate in a stacked arguement. (Such as trying to convince someone that the Earth is flat).
Get in a fight.
Self-mutilation.
Develop a disorder.
Yell loudly at everything.
Attempt to build a time machine.
Start a website about your life.
Change your personality.
Throw a party.
Write short stories.
Burn things.
Invent a game.
Invent a word.
Read game manuals and think about how fun they used to be.
Make a new set of freinds.
Go on a quest.
Take polls . . . lots of polls.
Institute a Survivor-like tournament to vote people off of a lunch table.
Try to distract someone who is trying to work.
Tap out S.O.S. until someone notices.
Obtain people's souls.
Insult a religion.
Bet on stuff.
Stage reenactments of wars using M&Ms.
Meditate.
Delve into philosophy.