The unexpected peril of painting -- too much time to think

It's one thing to be by yourself with distractions...at home, in a car, at the gym, in a store. But painting this week has become almost agita-inducing. Hours a day, alone with my thoughts...more so, PROBLEMS...as I brush and roll paint on, over and over and over and over, with NOTHING else to do but THINK. There's various great things about this gig, but I didn't expect to be saddled with so much weary introspection.