It's not productive to focus on mentally challenging tasks for ~8 hours a day, ~5 days a week, ~50 weeks a year. You're going to burn out insanely quickly. That

It's not productive to focus on mentally challenging tasks for ~8 hours a day, ~5 days a week, ~50 weeks a year. You're going to burn out insanely quickly. That kind of mindset--that idling is sad/"fraud"--is incredibly toxic, and it's the reason why US employees have terrible vacation time compared to some countries in Europe. You can take an hour-long break from work to do something relaxing/fun. It's really not a big deal, as long as you're being productive the rest of the day.