Agreed. Although side project which might turn into a company is a low friction way of getting into the startup world. Fix a personal irritant into an app. Or try to solve some big hairy problem like AGI and stumble upon something fun and valuable.
Run for an hour. Seriously, with great music or a tech talk in your earphones whichever you prefer.
Another good one is Heartfulness method of Cleaning or Relaxation.
YouTube it there's lots of videos of it.