I was a cofounder of a struggling startup for 3 years and probably one of the things that helped the most was a commitment that once a week, I meet with my band

I was a cofounder of a struggling startup for 3 years and probably one of the things that helped the most was a commitment that once a week, I meet with my band and we practice music. I play guitar and sing. It's mostly a non-negotiable commitment, so I'm leaving work on time that day of the week no matter what. I know it's not everyone's hobby, but singing does wonders to make you happy. Being around friends while doing so also helps.