Take 2 weeks off. Do nothing. Meditate. Breathe. Plant Flowers. Take long, exceptionally pointless walks -- if you find yourself thinking about anything, stop, and look up at the clouds till you recover.
And get rid of the huge sleep deficit that everyone in the western working world appears to have accumulated. 9+ hours might seem a lot, and you might feel like you're wasting time - but really it's your body trying to catch up. Let it.
