Coffee, paranioa (The good kind), peanut butter packets, somach acid, and lots of sugar.
That's how they stay awake for long periods of time.
With all appropriate disclaimers for my phantomworker fanclub who chronicle my every post, I always liked this song by Destiny's Child:
http://www.lyricstop.com/s/soldier-destinyschildft.i.lilwayne.html
ROFL!!