I think for BM- it's best to use good use of a select few resources- rather than use heaps of books.
If your teacher is good that's a bonus- but the best thing to do is to summarise all the notes you get into one copy of notes.
Personally, I used the Leading Edge, A+ NOtes and my text book to compile notes. Don't fall in to the trap of just reading the notes however- ensure that everything you have in your notes is linked to a REAL LIFE example. For instance- when looking at Operations Management- it is much easier to understand the concepts and principles if you can relate it to a real firm. There are case studies such as Ford- that chronicle the management systems. If you can understand these- you'll be less likely to forget the principles- and always have a practical example in which to reference.
I really like the Leading Edge book- because the definitions and explanations are easy to understand.
In reference to Shinny's post- I had the same teacher as him- and he essentially told us (for a definition question) to provide a definition, explain why it was important, and give an example.
Remember, they'll never make you down for writing too much in the exam- as long as it's all relelvant (however don't go overboard an not finish.) Define the hell out of every concept (for example if it says "Explain the importance of a firms corporate culture"- you'll need to define corporate culture!