I took Copyright and Trademark classes, and not a general IP, so I don't know if the following helps.
Emanuel's for Intellectual Property is handy as a reference. But it's not even close to a substitute for getting involved in the issues. Knowing and understanding the case law, and the relevant legislation, is crucial to doing well in IP classes.
Many students enter IP classes with fairly good (or, at the least, intimidating) knowledge, because they're particularly interested. If you want to match them, you might want to look at some books in your library, like Goldstein's Copyright Highway. And read a few recent important decisions: e.g. Grokster and Eldred for copyright; KP Permanente, Moseley v. Secret Catalogue for Trademark.