Oooops, my bad. Should have focused more on the balance aspect really.

I get what you mean by the internal pressure to work thing. You get anxious when you're not working, and that anxiety starts to nag on your psyche. I've gotten some good results with redefining work for myself, from "what breaks me" to "what compounds for results", but it isn't the perfect solution to the problem. Then, I subdivide mentally between work i should do and work I enjoy. The former category includes writing pieces of code I have to finish or studying for exams (I try to keep that kind of work relatively efficient and hard hitting), and the latter category includes things such as drawing or dancing, skills which are useful and relaxing at the same time.

Alas, it's what works for me.