We know that we can't study all the time, and when we're tired we change activity and do ''the thing'' that make us feel free and gain energy to continue the rutine. In my case I'm amateur astronomer. What do you do?
I like to cook and bake cakes, if I'm not in the kitchen in my free-time than I'm outside with my dogs.
hhmmmm...when i was younger i would walk somwhere where it would be no noise...so that i could realx my mind...or i would play basket ball...but grwoing up..at the beginning of the 5fth year i realise something very sad...because i would allways study for medicine i would never learn annything about the world i lived in...someone even said that doctors are the perfect robots for society..cuz we don't know anything else beside our job..and we have to admit that it really is true..we don't have time to read about anything else..just to know something about the country and about the time we live in...so i decided to combine both of them...i would walk to some place with no noise and i would read there..and it helped cuz it helped me even more to forget about my problems then just walking around ^_^ ...who want's can try this..who knows maybe it will help you as well