How to pull an all nighter?

So I have an anatomy test at 8:15 tomorrow morning and I really don't know a lot of it. I'm getting kinda tired but I know that if I fall asleep now and tell myself that I'll study in the morning, I won't have time and I will accomplish nothing. So, even as tired as I am getting, I might as well stay up to learn this stuff. Any tips on how to do that? I don't have "power foods", I am in a dorm room, and my internet shuts off at 2am.