When I just started out, I also needed about 1 day to rest for a 1 week vacation.
You just get used to it and you want MOAR!!! *g*

So far it's going well, but I also fell I get much less done than I thought I would.
Well, things keep popping up that weren't planned (as you saw in my newest entry ... my hay fever, so I had to go to the hospital again etc.)