If you can, it's just a job. They don't care about you so you shouldn't care so much about them. If you can find mental space to let your mind wander, take notes for ideas you want to do or even sneak in equipment or a sketchbook for doodling. This obviously doesn't work for all types of jobs, especially if it includes manual labor or any type of person-to-person care. Work isn't family. Sneak in time for yourself.