202107292312 Project structure notes should answer a question
Ask a question to start a knowledge project. This could be as simple as focusing your interest to an area worth reading, exploring, and adding to the Zettelkasten. Or this could be something as final as the thesis for an article, essay, paper, blog post etc.
Once you have your question to focus your project, answer it with the standard workflow while making sure to do your thinking inside of the structure note for that project.
Conversely, there are good structure notes that are organizational in nature. They implicitly ask the question "what do we know about this topic?" but they are not "project structure notes" as described here. They aren't about a specific project to learn research, learn, or develop ideas.