Running, yoga, listening to good (or bad) music, movies, travelling, doing things that haven't been done before.
RUSH, Dream Theater, The Notorious B.I.G., Buddy Rich, Alan Jackson, Iron Maiden - pretty much anything that doesn't have "Celine" or "Streisand" in it.
Two words: Dumb And Dumber. Wait, that's three words. See why that movie makes so much sense?