I also upload some common templates for things like my weekly reviews and tell it to use a template if applicable.
I'm sure if I drew diagrams and told it it could use Mermaid, it'd do a good job too. Would like to try when I get the chance.
It saves _so_ much time getting written notes into text. Writing things out helps me plan, but I much prefer to have content digital for syncing, backups, and searching.
This is all in a Claude project for reuse, but I've found most LLMs do a solid job, even the cheap ones like Gemini 2.5 flash (or whatever the low cost current Gemini model is).