A great many prefer the idea of transferring these points into a
classified note book, where they are available for use at any future
time.
One student tells of having written fifteen pages of notes from four
talks which he heard at a convention, and that some of these notes
were not transferred from his mind to the note-book for at least ten
days after the talks were heard.
Form the habit of letting the lecturer make you SEE what he describes.
The visual impression which you make will increase your understanding
of anything you hear or read, and at the same time very materially
assist you in remembering it.