I have tried many different solutions the last two decades, but none of of them really stuck or became useful over time. I kinda gave up and as a last ditch effort started to do the simplest thing I could think of: ctrl+D to add bookmarks in Firefox, jotting down a few keywords on each entry. No folders, no structure, just a flat list and some keywords.

A few months in I noticed how powerful this simple system was. When talking with someone else about a tool, github-repo or article I had seen but did no remember the name or title of, finding it back was suddenly a breeze. Since I keep my desktop and mobile bookmarks in sync, it it just a matter of typing in a keword in the address bar in firefox and it shows up instantly!

On desktop, you can limit the search to bookmarks only by starting with a *, which is helpful to avoid browser history etc.

I have really low bar for adding a bookmark now as the mental overhead is so low and it is done notime. It has become the second brain I always wanted :)