Do whatever you want (within reason) but just make sure you get the important stuff out of the way before you do. You can play games, watch TV, read books, play sports, go fishing, whatever. But make sure you did your important things first. Too many people want to relax all the time, and then they're always miserable because they're constantly relaxing, and then rushing to do something last minute. That's a recipe for misery, never being able to enjoy your free time, and setting yourself up to believe everything in life is hard and miserable so why try in the first place. Do what you have to do (be realistic) and then go relax. That way you get to enjoy every aspect of your life.