Only thing you need to outright memorise is facts and figures (EG: apple's profit). To use case studies, an example would be (I haven't done business for a year so will be a bit rusty) for marketing. When talking about how price is used to create an image for a product, you could use apple as a case study of price points. (I think that's what it is called). Eg: The apple iPhone 5S costs more than the iPhone 5C, to emphasise how the 5S has superior qualities. By setting the price of different models in increments, the buyer is motivated to pay extra for the upgrade. The increase price also conveys an increase in quality and compared to competitors (Samsung?), consumers see the iphone as being more prestigious and exclusive due to price. I'm not even sure if the iPhone costs more so that would be something you would research.
Obviously it would have to be a lot more thorough and well thought out than that, but as you can see, you don't really need to 'memorise' that much per say, as I think most would know about the differences between the iPhone 5S and iPhone 5C without trying. I chose the 5C / 5S because I have an iPhone 5C so I have a bit of knowledge without any research. In the same way you could talk about how Ferrari's price conveys an image of prestige and exclusiveness, which is compounded by the fact that they use an 'exclusive' distribution network, as I think there are only ~5 Ferrari stores in all of Australia. Again, don't need to really do that much research or preparation to know that.
A lot of case study material can just be covered with 'common sense' (as can most the course) like that. So if you are stuck during the exam, don't panic.
Visualise yourself succeeding, and as the saying goes, "Believe in yourself, and you're half-way there!" Good luck! If you're desperate, you can buy and/or download notes here from BoS. I bought some from this guy, and his notes and case study were so good I did well for my Trials. L
