i think it is important to outline the notes. the key issue is how much. i didn't even read the notes in torts and got an a-, but i was all over casebook notes in property, so i think it depends. focus on the cases though and make sure you undertand the takeaway, the rule, the pedagogical point, whatever...this should come from 1) professor; 2) cases; and 3) casebook notes. if you get it from reading the cases and through listening to your professors, then spend less time with the casebook notes and work on the application of the principles.
(note: study guides are absent).