re: What do you do to clear your head?

I have a few strategies.

I really like to do something physical. Going for a run or just shooting some hoops is a great outlet for me. Just turn the ol noggin off for a while and just run or shoot

I also like to watch an episode or two of a favorite show in which I can really wrap myself into the story. The Office is a popular choice. Also, How It's Made is great for it

Music is a great way too, usually because you can find something that goes with any mood. I usually pair this with playing MLB the show. I can wrap myself in the game and the music, allows me to leave reality for a bit

Lastly, especially if I am trying to get to sleep, I play an audiobook with all the lights and TV off. I cannot tell you how many times I have listened through the Harry Potter audiobooks done by Jim Dale. I let myself just listen and fall into the story and watch it unfold in my head. Before I know it I am relaxed and eventually asleep before I know it.