This right here is one of the greatest quality-of-life improvements I ever adopted. Every single email you get, if you don’t absolutely want it, find and click the unsubscribe link in the footer.
(Standard disclaimer, don’t click links in spam. Only do this for senders who got your address through some kind of legitimate purchase or account sign-up.)
Each time you buy something, and they send you that first “hey why not buy something else too?“ message, unsubscribe. It takes a bit of discipline, but it pays dividends.
It is possible to get to a point where you hardly receive any mail. You can get to inbox zero doing this. It’s genuinely refreshing.
Sometimes I catch a glimpse of other people’s inboxes and, my god, I can’t imagine going back to that life.