Keep class participation to a minimum. Only speak when the prof asks a q and u have the answer. Dont offer your opinion on anything cause noone really could care less. Ive noticed a direct corellaton between how much you talk in class and how much you will be despised and mercelessly ridiculed by your classmates. Besides, class participation and preparation have no impact on grades. The people i know who wrote holmesean briefs and kissed the profs ass were all dissapointed with their grades. Its all about the BLL and applying it on the exams..period!