I like the “About Me” section idea. Agree on organizing by date, I use a calendar at the moment and it’s useful to flip back and check when I last did something.

Maybe a template/page for Pet Sitter instructions with Vet + Emergency Contact info? I know every time I go to the vet they ask me the same questions about food, so having a place to write down the names/brands of pellets, treats, and hay would be useful. Maybe a medication list too, for buns who are on regular meds.