Yes I agree, time off is all part of the rhythm. I am not saying work like a maniac in a merciless and relentless way. No, no, no. Bad idea. My way of working is a slow saunter, smoothly working along through the day without rush or anxiety. Just doodling along slow and steady without getting run down - take naps, sleep whenever you need to, go out for walks, etc. But doing it with intentional and purposeful design. That all. And depending on long term organized accumulation to do the heavy lifting. For me, this allows me to think on a bigger scale by extending the horizon.