[quote=Andromedai]
Video games, sleep later!
[/quote]

This is the only way I could stay up all night, otherwise I just fall asleep.

Honestly though, unless I was on something all-nighters seem sort of pointless. Sure you've revised all the material but you'll be so tired it will be hard to recall, also you'll be nowhere near your mental best and that alone could screw you. And there's also the fact sleep is part of memory consolidation so you've missed out on that as well.

Overall, I'd rather get a good night slep than fall asleep in the exam.