Cargo pants are awesome, but they only rock if they have 9 or more useable pockets.
What's in my pockets depends on where I am. Lately, at school I carry in my pockets my room keys, my flash drive, my wireless mouse, chapstick, at least one rubber band, paper clips, about 5 assorted pens/pencils/whiteboard markers, an eraser, a small pad of paper, and a handkerchief.
I am notorious for misplacing my pens/markers, so I always carry a ton. I've been considering making or purchasing some kind of tool kit to hold all this junk, but ... jeez ... I'm a geeky enough teacher without, yanno? At least I don't have pocket protectors! LOL