I've recently started taking yoga classes, and I have to say I love it. In fact, I love it so much that I've started practicing at home. I find that it really helps to center me and clear my head prior to writing.
In case you're not familiar with yoga, my lovely assistants and I have prepared a quick primer:
Standing Forward Bend (with optional puppy-swatting):
Downward, facing dog:
Locust Pose (with doggie spotter):
Give up and let the dogs win: