Schedule wise, I do some regular evening hours (2 / week) to catchup - that can be a real problem sleep wise. If you finish your calls late in the evening, especially the ones where you are the one doing the talking and presenting things, it's very hard to go to sleep straight after that. You need to add at least 1h of winding down time.
As for motivation, from my experience, when I'm working on something I really like, I'm 10x more efficient that I would be in the office. When you start in the morning, you know that for a long period there will be nobody to interrupt you and you get a LOT more done.
The opposite is similar though - when I'm not motivated by a project, it's insanely hard to motivate myself. But maybe it's a sign that the project shouldn't be done in the first place.