Rest is an important part of the training because that is when you build you up, but then you also have challenged your mind and body before the rest.
Sleep is a state you can feel at any time, such as when you travel by bus, driving, sitting in a meeting or when you run. Train yourself to rest in everyday situations instead of always perform and keep up with everything and everyone. Learn to be comfortable relaxed when performing always best no matter what the case.
It is also important that you sleep well. Most people sleep well when they have slowed down mentally and physically for a while before they put themselves and sleep in a dark and cool place. Learn what you need to sleep well and create these procedures, and physical and mental conditions for yourself.
In the rest, give yourself time to feel and listen to yourself. And dialogue with yourself can be the most rewarding you have in your entire life!