I used to put a fair bit of effort into curating and filing emails, documents, etc. Over the past decade or so, aside from making sure that I put things I wanted to hang onto over the longer term into Archive folders so they didn't get deleted, I mostly stopped filing things and figured I'd just search for them if necessary.
Doesn't always work especially if I don't remember quite what I'm looking for. But it's overall a reasonable tradeoff compared to filing a bunch of stuff, most of which I'll never look at again. It is a shift in mindset though.
Years ago, I developed a similar habit with email.
I like to get emails out of my inbox as soon as I don't need them anymore (so my inbox always only contains the email that still requires my attention). But I don't do any sort of serious categorization/tagging/etc. -- the cost/benefit to doing that far too high.
Instead, I have a folder for each entity that I exchange emails with, and move the emails into the appropriate folder when I'm done with them, with no further categorization.
"one-off" emails (marketing, registration, etc.) just get deleted.
Doesn't always work especially if I don't remember quite what I'm looking for. But it's overall a reasonable tradeoff compared to filing a bunch of stuff, most of which I'll never look at again. It is a shift in mindset though.