read a book
Just finished "The Art of Learning" by Josh Waizkin, who was the real-life subject of the movie "Searching for Bobby Fischer". After being a chess prodigy and success, he switched to martial arts and became world champion, as you do. His insights into high-level performance are fascinating, and I was surprised to learn that chess and martial arts play-by-plays can keep me engaged. Great read.

https://amzn.to/2Vv0J3a