How do you stay awake?

I have to get an EEG done tomorrow and need to stay awake until midnight tonight and get up at 3 a.m. Mind you I was ready for bed at 7 last night.

So, I thought I'd ask you all how you stay awake. (Oh, I'm not allowed to have caffeine either). Don't be afraid to get silly with this thread as I may get some idea in all the silliness and hijacking. LOL.