2017: Leave Work Ready for Life - Breathing Space Blog
To sustain the habit of leaving work on time, start with a small step. Leave without guilt. Hereafter decide that on, say, every Tuesday you will stop working on time and take no extra work home with you.
After freeing up Tuesdays for an entire month, perhaps add Thursdays. In another month add Mondays, and in the fourth month add Wednesdays.