Enjoying Empty, Quiet Space

I teach a lot about workflow and work-life balance... but sometimes, like tonight, I do stay up past midnight to get a lot of work done. My biggest problem is that once I've become efficient in one area of my life and freed up my time there, I tend to refill it too quickly with something else - good things mostly for work and life - but because of that I don't take the moment to enjoy the emptiness of free time. Does anyone do this successfully? Learned how to enjoy empty, quiet space? Photo by @MosheZusman