For me, playing guitar. When I was grinding through problems sets in undergrad in my room, I’d have my guitar in my hand running scales or whatever to keep my h

For me, playing guitar. When I was grinding through problems sets in undergrad in my room, I’d have my guitar in my hand running scales or whatever to keep my hands busy. Now I do something similar while watching TV. The best teacher I had told me that his teacher told him when he started out that “the best way to get good at guitar is to watch a lot of baseball games”