There is another very important thing you can do in free days and I forgot to mention it in my last post When You don’t Feel Like Freelancing.
That thing is: Extend your knowledge. Learn new technologies!.
And I selected to learn and switch to a better operating system. And thats, of course, Linux :) I had tried it as an amusement during studies but could not switch to it that time (We had Red Hat 6 & 7.2 at that time; must be 1999 or 2000). Will be writing a series of posts about my experience with Linux. I hope they will help you decide. Stay Tuned.