This is more of a personal experience thread than just a counter to rubah's thread (though it is also that).
What's the longest you've ever gone without sleeping? What methods did you use to keep you awake during that time?
For me, it's about 27 hours (from 9 AM yesterday morning to noon today). During that time, I wasted time around the house, picked up a corsage, ate things, went to prom, played poker, jumped on a trampoline, watched Dane Cook and Robin Williams, and had someone sleep on top of me in a not too comfortable position for me to sleep in. I'm still hungover from it, because I've only gotten 3 hours of sleep since.