Um... Day-dreaming, reading, drawing, music, sometimes homework actually.
I recently found, It's hard for me to work unless, I 'restart' myself. Which I normally do in PE, while walking, and just look at the world around me, losing the sense of all of those around me. And just focus on nature's beauty :) so, basically daydreaming, but not at the same time.
I also, just lay there. On the floor(not at school. Gross!), bed, couch. ")