I have heard this question from a few underclassmen at my school. My advice is the same, for the first semester you MUST write an outline for every class. After you get your feet wet with law school exams and grading you can tweak your system to fit your needs, but for the first semester I would take the extra steps and write a full comprehensive outine. Using someone else's outline, in my opinion, is the most dangerous trap you can set for yourself. It's hardly the information in the outline that provides the best exam prep, but the actual outline writing that forces you to pull everything together in a cohesive fashion.
I didn't feel like spell checking or re-reading this post, so I don't care if there's grammar or spelling errors.