Things I do to cheer myself up:
1) Talk on the phone to my mom or sisters. That usually provides me the balance I'm lacking at that particular moment.
2) Take a nap. If I'm feeling really low, chances are I'm short on sleep so a nap truly works wonders.
3) Häagen-Dazs - Chocolate & Dark Chocolate Ice Cream Bars. Oh yeah. (I think I need cheering up tonight during Survivor!)