One of my siblings, the best educated in our family, had what we'd generally call a good career from university until kids arrived. She then went through a couple of jobs at the schools and once our parents started getting old she moved to kitchen staff & waiting jobs.

Talking it through with her one day, it made great sense. At the end of her shift, once she'd tidied up and set up for the next shift, she would just walk of of the door and there would be no thoughts of work again until she clocked in the next time.

When I was programming my mind was always working, even on holidays ideas would pop up and I'd follow them. I am now in a family business which is with us 24 hours a day. There are times I'm envious of her ability to completely switch off.