House wiring can be confusing and they're all different so there are no Clymer drawings to refer to
My Mom & Dad had this house built to Dad's plans so it has been in our family since new ('94). The builder's electrician did a good job and and I did anything that was added later (when Dad finished the basement I came along behind him and added the wiring &c and we've lived here longer than they did). Even so I found myself wasting a lot of time figuring out what is on which breaker because the notes on the panel weren't complete enough.
In the past I have written the breaker number on the front of switch & plug plates in the basement & garage and on the backs of them upstairs. That helps but markings can wear off, some still haven't been marked and I'd prefer to know without removing plates.
A few months ago I started a little notebook with a more complete list than there is room for on the panels plus pages for each breaker that has multiple items, all written in pencil so that it is easy to update when I change something. The book hangs on a magnetic hook on the panel so there is no excuse for not entering more information when it is found.
BTW, We renovated our kitchen last year and I'm calling this winter's project 2 Bathrooms, a Laundry Room and a Landing. I haven't posted anything about them here except the odd passing remark because it isn't bike related. Let me know if you guys are interested and I'll start a thread (if enough are interested and enough of us are renovating maybe a new forum area might be merited).