Shooting. 4 rounds, four shots to the head. Better than the other older guys at the range too. They also had the gun hooked up to a computer, so it tells you what you're doing wrong (barrel sway, slanted gun, etc.) and all mine were in the green. Not bad for a 16 year old huh?
Shooting games obviously.
Writing, partially because I rip my storylines, characters and all sorts of stuff from games, books and movies. For my exam I combined Battlefield 2142, Halo(games and books), Red Alert 3, Command & Conquer 3, Mass Effect, Crysis, Bioshock, Call of Duty 4&5, Mechwarriors, Assassin's Creed, Metal Gear Solid and the Dawn of War series into one, kickass 2000 word essay.
Reading I guess. Read the entire Harry Potter series in one afternoon.