[SeanAnderson]

Meditation sounds like a good solution. I suggest Ten Percent Happier. The CEO at my last company recc'ed it to me and I've found it to be quite good. It's a paid subscription, though.

Outside of that, I engage with flow arts (specifically poi spinning) to get out of my head. The reason it works for me is because the moves require an absurd amount of bodily concentration which forces my brain to disengage. Later, as a trick becomes rote and requires less physical concentration, I find that the hours I spent practicing resulted in habituation wherein I drop out of my "thinking mind" whenever I pick up my props - even if the tricks I'm doing are easy enough.