Here's a question, how do you stay awake at work/school?

I happen to be pretty fortunate to have a desk in the corner of the office. I can surf the net without people knowing what I'm actually doing. That being said, I've also set my browser settings to erase everything I've done when I close them, including everything that might pile up in the temp file on this computer. It's a shared computer so you learn how do trace your steps and erase everything pretty quick. Especially when you're bored out of your mind and afraid of getting found out at work . That being said, I'm usually on here either lurking or saying something useless trying to keep myself from falling asleep.

Which brings up the question, how do you people stay awake? I don't want answers like loads and loads of coffee. Those tend to wear off pretty quick. For me, it's music (When I'm not on here or other forums) I get a nice beat going and it keeps my satisfied.