Exercising doesn't only take time and energy; it creates them. Learn what exercises your body needs and practise those regularly. And in the meantime you make progress: as the body develops, the mind develops, too. Unfortunately, it is not true the other way around, look at great scientists who only cultivate their minds, but their bodies decay. If you train your body but not your mind, you will be strong and stupid. But if you develop only your brain, you will be smart and weak. But if you pay attention to both, you become strong and smart! This "strong and smart" level can only be gained slowly, working on both sides simultaneously....