Watching your favorite shows and movies, re-reading your favorite books, and listening to your favorite music over and over actually has benefits: it puts your mind in a state of ease. As humans, we have a limited pool of mental resources. When we're overwhelmed, we begin to have less self-control and less motivation for the tasks at hand. When you watch a rerun or listen to your favorite tunes, you don't have to exert effort to control what you're thinking, which means your brain can do a quick mental reset.