While looking up information for creating My Leica Camera Timeline, I ended up in a bunch of old Tinderbox documents, dating back to 2008.
The above image shows a project map from my 2009 daybook Tinderbox file. It's so easy to understand what was going on when I can see my notes visually like that. But I also have the same information in a simple outline.
I know I talk a lot about how plain text is so great and future proof, and it is. But it's best for searching and less useful for understanding. At least for me.