A balance between using your time off to recharge and using your time off to prepare seems, to me, to be the necessary factor for low-stress and happiness.
When I have a day off, if I spend it entirely in “relaxation mode,” I end up feeling stressed and often depressed by the end. But if I’m productive all day, I often feel… well, like I need another day off!
I need to unwind, but like a good watch, I need to be rewound again.
The Opportunity Machine 