Hobbies basically. Something that requires focus but that's completely different from what you do at your job. I've worked in front of screens for most of my working life and a few years ago I wanted to try something manual. I ended up learning how to make shoes! Never in a million years would a younger version of me see himself learning to make shoes, but that's what I did. Eventhough it was challenging, it was oddly relaxing to be doing something away from screens and spreadsheets. Sometimes you just need a little change of environment.