I have a couple of things I do to clear my head when I need it. The first is exercise, the kind of exercise that makes me lie on the floor afterward gasping for breath and wonder if I'm actually going to be able to breathe enough to not die. The other one is playing music.
Those moments of play that we do get in meta-life, like playing music, or golf, or word-play, or flirting - those are some of the best parts about being alive.