In reply to Mad.

Mad, Thanks for reading and passing the questions along.

Those are sections that I use each day, especially when travelling or out and about to differentiate pieces as I work. (Mostly they keep my desk clear of dozens of piles of cards too.)
- Blank cards are a necessity for writing things down;
- Priority cards are things that generally need to be done today;
- Project cards are things I often need for projects I'm working actively on today;
- Notes section is a holder for quick notes I've jotted down that need processing at the end of the day for follow up later or for rewriting/expanding and then filing into my zettelkasten/commonplace book;
- File is a section to toss cards during the day for filing at the end of the day or when I'm back at my desk and have time.

If you Google the Eisenhower matrix (for which I use the shorthand labels of Crisis (Urgent and Important), Schedule (Important but Not Urgent), Distraction/Delegate (Urgent but Not Important), Defer/Delete (Not Urgent and Not Important)), you'll find a ton of spilled ink within the productivity space for prioritizing your daily to do lists based on the framework that General Dwight Eisenhower used. I use it specifically for that functionality with respect to prioritizing my to do lists.

Recurring tasks that have been done get filed off in the future under either the months or the dates when they next need to be addressed. This happens within my Memindex/daily journal cards section. I've recently set things up for 2026 here: https://boffosocko.com/2025/11/17/memindex-for-2026/

I've tried planners, calendars, bullet journaling in notebooks, digital apps, etc., etc. and mostly just appreciate the ease and portability of index cards which are cheap and pretty sustainable and work alongside of my commonplacing/zettelkasten work. Plus, how can you not love a solid, vintage box?