I kind of end up doing the opposite of what most people do, not by intention. I simply use the person name. For any note, I write a note title and never worry about repetition because if I do happen to give two notes the same title then the second note automatically gets a (1) marker next to it. This has only happened once and in doing so I was able to quickly identify similar notes then combine them.
If for example it is a persons name then I have a folder for people, An index list (moc or map) of all people. My brain gets easily fried when I try to have naming conventions.