Jerry Seinfeld has the 12 month rule for clothes (I think). If he hasn’t worn something in the past 12 months he has to get rid of it.
Amusingly, in the last week of the 12 month period I recall that he wears everything he likes and doesn’t want to discard. Sometimes changing two or three times per day.
It occurred to me the same could apply to friendships. If you haven’t spoken to someone for 12 months it’s time to move along.
Or call all the ones you don’t want to part from, all in the one week.