Once you've gone through the books, then it's down to question practice.
I made extensive notes but that was because I found that by writing things down, I could remember them. The very important stuff like formulae and data, I wrote down in a notebook which I carried with me to revise from whenever.
When I went through the QBs, I made a note, in a pocket notebook, of all the questions I got wrong so that I could go through those again and again.
Cheers
Whirls