For total and complete mind clearing though, I play my clarinet. I play with the local community band. When we practice, I have to be totally present in mind and body. I have to focus my eyes on reading the music, my brain on translating what I see to a finger position, my lungs on blowing the right amount of air, my mouth and tongue on creating the character of the note. I have to pay attention. Listen to the other people playing around me and match their pitch and timbre. I can't be thinking about my day or how my linocut didn't turn out quite as I planned or what I have to do tomorrow. I have to be there, in the band room. Completely.