Tips for staying awake?

Hey, so I've gotta be up in about 2 and a half hours and I think it'll be easier for me if I just stay awake cos if I go to sleep now I know I'll find it even harder to get up or probably sleep through my alarm. I can go to sleep at like 12-1 this afternoon so I don't have to stay awake to long! Does anybody have any good tips for staying awake and then what food/drink I could have to give me energy to survive til 1pm? Thanks x