there is a place i go, and i actually have a picture of this place in my profile pics, and i just go there and sit or stand, and think about life!! its a very peaceful and calming place, and i like it there!!
It's not always the same for me, it varies.Sometimes:
I play music on my guitar, either wildly, or quietly. Sometimes it helps me to lose track of the world around me and I can go for two hours easily.
I go to the gym and get on a treadmill and play tunes on my mp3 player...