I have this annoying melancholy about me--the kind of "fatigue" that sets in about 1/2 ways through school, when you just want to do absolutely nothing (because when you're doing something not school-related, you somehow feel guilty for not focusing on your schoolwork).
I told Jon the other day I just wanted to go lay beneath a tree and ... listen to the wind, or something. Not out of nature-worship, but because there's something about being outside that allows you to do nothing without turning into a passive slug (i.e. vegetating in front of the TV for 5 hours).