How do I stay awake?

Masturbate furiously.

Have a cup or two of coffee MAX and just keep yourself busy. Don't laze around or sit on a comfy seat. If you get headaches, take a 1hr nap.

Set your clock for 20 minutes, take a nap for that amount of time and you'll wake up feeling like you had a full nights sleep. :D

Eat apples they have more caffeine than a cup of coffee.

Or take Vit C that keeps me awake.