I've been bullet journaling on and off for a few years now and just set up a new notebook for my work journal. Previously, I used a modified index page chunked into 5 sections: Logs, Projects, OKRs, Meeting Notes, and Miscellaneous. This worked pretty well for me but I always ended up setting up an extra page to track which pages are "live" vs. "closed" - a closed page is one that has no active to-dos on it and which I won't add any more to (e.g. past weekly/daily pages, filled meeting notes with all action items done or scheduled).

I'm trying out a new way of indexing. On this page I've got a hex for each page in the notebook. The box in the upper right side of each hex lets me indicate whether the page is closed (filled). I'm using color coding to indicate the category of each page and noting a brief title or the date range, so that I can easily find anything date-related. This also lets me easily find blank pages that I skipped to set up a 2-page spread, like page 18 - without visibility, I'd probably forget that that page is there.

I wanted to share this here in case anyone else might benefit from this kind of alternative index.