Would love to collaborate with you on this one.
The system that I use for now is on an app called Notion. It is a note-taking app which is built on relational databases, which is basically saying that everything is stored in a table and you can link different tables to create a huge database.
To give you an example, I have created a list of Mental Models along with a short explanation from Farnam Street. This is in one single table.
Then I have a different list of all the articles which I find interesting. I tag these articles with any relevant mental model.
At the end, what I get when I open my Saved Articles notebook is a list of all the articles with the mental models used in each. And if I open my Mental Models notebook, each one has an article tagged with it.
Would be happy to connect with you and learn about your process as well.