If you take too many notes, theywill swamp you. You wi ll shuffle and review them over and overand be left bewildered. It will be almost as bad as having all therelevant books and encyclopedias piled on your desk. So takenotes only upon what you judge to be: the main new points,the complex events or ideas, the striking statements (for quoting),and also your ow n thoughts as they pop into your mind whilereading in preparation.
advice about quantity of notes