Sometimes when my brain gets crazy, I get in the car and go to an art museum. I feel the fresh air swirl as my brain opens dimensionally again. Sometimes it may just take one or two paintings. Other times I visit whatever special exhibit is going on. I am blessed to live very close to the Legion of Honor, the De Young, SFMOMA and the Asian Art Museum. All are first class.
Here is Jon Carroll's column on art:  http://www.sfgate.com/columnists/carroll/
And here is something to massage your brain.