I have a lot of reasons why I have a draconian relationship with phones and e-mail.
Avoiding a 24/7 work week is one of them.
I learned a long time ago the office needs to stay at the office, so the only non-office contact number I give is my residential land line. I don’t check work e-mail at home, mostly because I’m not set up for it, which of itself is a way to keep distance.
It helps that I’m not in a management position, and that too is deliberate. I don’t believe in climbing a ladder to be more successful — I move laterally.