I agree that commercial outlines and to some extent commercial case briefs are a waste of money.
You will have access to West and Lexis. Your time right now could be best spent
taking the tutorials on how to use those sites. There are links to them athttp://www.law-school-books.com/legal-writing.html
Then get Delaney's book Learning Legal Reasoning.
If you are going to buy any study aids, get Examples and Explanations first and then go from there.