Want to digitally de-clutter AND improve privacy? Be okay with deleting things!
Gmail (and other products) train you to just “archive” things when you’re done with them, but… why? If you don’t want or need it anymore, you don’t really need it sitting around as an ever-present data mine for Google or anyone else. Same with photos; Google Photos suggests you “archive” blurry photos and screenshots, but… you can just delete them!
Obviously save what’s important, but default to delete.