I have separate phones for work and home
The work one stays at work (to charge overnight).
The home one stays at home (to charge over the day)
I don't take personal calls at work because I am there to work.
I don't take work calls at home because I am there to ... home?
The only private-life person who has my work number is my mum (who is vocally peeved by people who constantly take private calls at work instead of doing their job, so won't call me unless it is a genuine emergency). Oh, my real-estate agent also has my work number, but they aren't in the business of calling me unless it is important.
The only work person who has my home number is my immediate manager (who is happy with me doing my phones like that, and I trust to only call me for a genuine emergency).