For my school, where accounting is especially competitive, I found it really useful to go through past vcaa exams and look for theory questions. Rote learn the responses to these questions as theory does not change very much from school to school or between exams. I studied at least two weeks before all my accounting sacs. If you're using cambridge, be wary of some of the theory as they can either be dodgy or bad. But generally it is okay. in terms of doing the prac, just make sure you understanding why your doing all the entries you do and have a system whenever you do recording and reporting. When you get towards performance evaluation, where open and insightful discussion is a must, make sure your original and justified in your responses. As long as a you can provide evidence for any of the reasons you give, you can always get full marks on those tough questions. Hope i've helped a bit. Also flash cards for theory can really help.