Unfortunately, the last few nights I've gotten about 6 1/2 hours of sleep (go to bed at 2, get up at 8:30 thursday and friday, bed at 3:30 and up at 10 today), when i really need more. And I can't nap during the day to make up for lost sleep.

My longest non-sleep period was about 27 hours, on prom weekend last year. And I was driving, too. FUN!