"Rest is Change of Work" - This how I was taught during college days. It is the variety of things that we keep picking up and new challenges and problems we are trying to solve make our mind active. This energy drives all to find the appropriate solutions. The key feature is to have an open mind. There are many ways to achieve this:
Stimulate your ears differently.
Stimulate your eyes in new ways.
Learn about different people and lifestyles.
Click here to find more ways to Energise your mind.