According to the book "Rest: Why You Get More Done When You Work Less", the best way to rest is to do (i) physical activities, (ii) which are cognitively demanding, and (iii) in touch with nature. When these three factors happen, you cannot think in anything else. Your body, your head, and your soul will all forget about work.

For instance, try picking up an outdoor sport which is new to you, e.g. kite-surfing, snowboarding or climbing. It will fulfill the three requirements.