I noticed non-promotional emails rarely have the text "unsubscribe" while most promotional emails do. So I set up a filter to send all emails with the word "un

I noticed non-promotional emails rarely have the text "unsubscribe" while most promotional emails do. So I set up a filter to send all emails with the word "unsubscribe" to the Gmail promotions tab. This catches most emails, even the pesky ones where "unsubscribe" doesn't seem to work. And I only get mail notifications for non-promotional email. These promotional emails also get tagged with "sub", so I can omit them from my searches (or search promotional emails exclusively.) I made a simple bookmarklet that toggles `-label:sub` in my search query. You can apply the filter/"sub" tag to emails you previously received, so this really helps clean out your inbox!