I enjoyed reading your guide. It’s laid out well.
What are your thoughts on note titles? I have found them to be an important structural element of my vault structure.
A note writing principle I would add is ‘Conversation with yourself’. If at some future point you find that you disagree with a note, don’t make major edits to the existing note. Instead, create a new one discussing your new train of thought and add a link in your old note.
For practical implementation, ‘keywords’ wind up being important to me for searching. If I am searching for an idea, I sometimes rely on certain phrasing, keywords, or verbiage to locate them. It’s not something I stress over when writing a note, but if I have a hard time finding a note I will make strategic edits to it based on search terms I used trying to locate it.