Staying Awake When Tired

[theBruiser500]

After getting back to college a few days late with full course load and plans for many extracirriculars I've been really busy so far and have been getting very tired at night. Anyway, when I get tired I have no willpower and if I was planning on doing something, like practicing piano, or doing homework I just can't do it, I go to bed. How do you guys stay awake when tired?

Please no caffeine suggestions, it doesn't work for me, and I don't want to drink soda, it's a pain to boil water for tea here and I want something else. Splashing cold water on myself works too. Any really clever ideas out there?