This is an area where technology has made the original method obsolete.
In Obsidian (as I use it) one can add #tags, which are automatically indexed, and [[internal_doc_links]] which can be automatically updated on move / rename.
There’s no longer any need to spend time thinking about how to organize this unique id system as though you needed to put a physical card into a linearly ordered physical pile.
Not doing so reduces the friction of taking notes. For me this is very powerful.
This is an area where technology has made the original method obsolete.
In Obsidian (as I use it) one can add #tags, which are automatically indexed, and [[internal_doc_links]] which can be automatically updated on move / rename.
There’s no longer any need to spend time thinking about how to organize this unique id system as though you needed to put a physical card into a linearly ordered physical pile.
Not doing so reduces the friction of taking notes. For me this is very powerful.