I go to the gym twice a week and to the swimming pool another two times - and I don't even live in the same neighbourhood where they are. And when I'm working, I take a 40-minute lunch break and another 30–40-minute break later on. I also sleep a lot. As a result, I'm chronically short of either time or the desire to work at the computer at home. So all sorts of things remain undone, including my LiveJournal. Heck, I can't even finish reading about how to do the exercises properly – I've learned a very limited set and have been doing them for several months now.
On the other hand, I'm building a new project from scratch at work, and although it's still very small, I've learned all sorts of things. It's useful to build everything yourself from scratch instead of using someone else's work – things immediately become clearer in your head.