Ask HN: How do you keep energy to work on personal projects after work hours?

I have been on vacation when I started working on a personal project, so I had plenty of time. Now that I’m back to work, I feel I’m struggling to keep up, because once I arrive home (I work from 9am to 6pm and commute time is 1 hour) I’m so tired that I can barely focus and code. I’m very passionate about this project and don’t want to just work on it during week-ends.

How do you do it?

PS : I also want to start working out, but do I even have time for that if I can’t free time to work on my project?