Could you maybe talk a little about maximizing that hour for personal projects? If I have an hour to do something, I really have about 30 minutes because I have to mentally organize myself to the task at hand.
Prepare everything you need for the next day. Have clear actionable steps. What can't be finished in the work session gets discarded and broken down into simpler things for next work session. In few weeks you will get _very_ good at preparing and breaking down tasks. Always leave work in a ready to work on state, don't leave hairy tricky problems behind.
I leave my pc on in the office, with ide and terminal and everything open 24/7 .