My friend Melissa once told me chickens brood, sitting in what could appear to be a very unproductive manner, in order to be uber-productive later. I’m paraphrasing that a bit.  Melissa said it much better-she lives on a farm and knows things and knew I needed to dial it down at the time.  All this is to say, unproductive behavior can breed productive behavior.  You must rest and relax in order to maximize your creativity, thoughts, skills, productivity, etc.  And if you are a manager or leader, you must allow those you are leading to do so as well.