How do you balance your study and extracurricular activities

First of all,I do realize my study is important,so I will work hard at the best memory time during the day.When I get tired,I can listen to the music or go out for a walk and so on to make me feel relaxed.All work and no play makes Jack a dull boy.So I really think it's not a balance thing,because study and activities,they are complementary(互补的).Thank you.