I've been an entrepreneur/freelancer for almost a year now and took my first full week off last week. I had a lot of plans of things I needed to take care of or wanted to learn, but my wife reminded me that a break needs to be a break from all work, not just paid work. And so while I didn't learn python, I did spend a lot of time with my kids. And while I didn't update my website, I was able to get out on a long bike ride. I slept in almost every day. 

And now I am refreshed and ready to take on more work with a fresh perspective.