Oooh, this is something that I've had trouble with when I'm working. After constantly being on my feet for 12+ hrs I DON'T want to do ANYTHING when I get home.
I hate getting up in the morning. So I went straight from work to the gym or changed my clothes before leaving the hospital & went somewhere to walk or hike. If I went home first, FORGET IT!
I was on that sofa w/a beer & ordering take-out!
I also like Don's idea of doing the short workouts that are available on SP. Some are 15 min, some are 30 min - they use little to no equipment & require very little space.
HTH - let us know what works for you. I'm always interested in finding new ways to work in exercise.
Stay calm and carry on.