Make sure you know the content, from the study design and notes. Also take into account any hints your teacher has given you, intentionally or not. Also know what the questions are like, how they are stated, and how you are meant to respond. Make sure you address all parts of the questions, make special note of key words such as define, give an example, distinguish, explain, etc. And make sure you do define or give an example if required!
EDIT:
Business is not a very difficult subject, the material is quite basic(I thought). Though the part where I fell short was in the structure and content of my responses. Jam lots of justification in, and just keep writing, relating everything back to the case study. I've been told the general rule is write
twice as much as you think you should. If your teacher has already given specific advice for answering questions, follow that rather than mine.

Anyway, good luck! Full marks, going for 50, yeah?
