When I was still in Libraryland we promoted (and participated to the extent that we could) https://www.nationaldaycalendar.com/international/global-day-of-unplugging-sundown-to-sundown-march-1-2
It's exactly what you're talking about, unplugging for a full 24 hours. This is only once a year but a personal goal could be once a month, week, whatever.
