01
Use a claim as the title
Instead of “Chapter notes,” write a sentence about the idea you want to preserve. A specific title makes the note easier to find when a related problem appears.
02
Explain it in your own words
Keep the explanation short enough that you must choose what matters. Then compare it with the source to check that you have not removed an essential condition.
03
Attach an example and a limit
Add one concrete use and one situation where the idea might not apply. Together they make the note more useful than a decontextualised slogan.
04
Link to a next action
Finish with something to make, test, or explain. Include the book and page reference where available so you can return to the original argument.