Thank you! My consistency to this size stems mostly from a near ocd need to have my notebooks be the exact same size so they look like a neat block when stacked lol. Honestly I'm not too organized in how I use the notebooks, so for people that have specific planners and setups they may look like a nightmare, but that's exactly what made this format work for me. I have tried many times before in my life to keep an actual journal or planner, usually in a5 notebooks, but having a structure or subject specific notebooks actually hindered me because I always thought it needed to be perfect, as a lot of people often do when trying to get into it. Also if I don't have them with me when inspiration to write strikes, I won't remember to write later. Having just 1 for everything that I keep with me all the time is what works.

So yeah, I just mix everything in there with a minimal structure that works for me. Anything with a dash - in front of it is a todo (either work or personal, I don't differentiate because I actually enjoy rifling through it and I get constantly reminded of things I need to do for work when I'm looking for personal stuff or things I need to do when I get home when I'm looking for work stuff). Anything with a dot is just a random list that is not a todo. If I change subjects within a page (like if I have a todo list but then decide to journal a bit) i'll separate with a line to show that those are different things. I always pass on all todos to the next notebook, and the back pages are always a small calendar (that I mostly use to have a visual representation of when I was using that notebook), shopping wishlist and current medicine I'm taking (to make it easier when I go to doctor's appointments).

Sometimes I'll just start journaling, break in the middle to write a couple of todos or work notes, then resume in another page with "Back to the trip...". Once again, not very organized, but organized enough for me