Grab my notes, identify all the processes, definitions and lists you need to rote learn (i.e. not stuff like advantages/disadvantages; they're easy to make up), and then read it, say it out while looking at it, write it down while looking at it, now say it out a few times without looking at it, and then write it without looking at it. Do these steps over a few different things you need to learn in a relatively unstructured order so that you're not going through this process for one thing to learn entirely, then for the next and so on, but that the process overlaps for a few different things so that you commit it to your long-term memory rather than your short term.
Also, like half of the marks in BM are basically in how you write your answers, not your actual level of knowledge. It'd be wise not to only learn the theory, but to practise how to write answers. I only did 1 trial exam, but where I had my advantage was firstly of course knowing all the theory due to writing my notes, but more importantly, having mastered the answer writing process early on in the year. And because I'm feeling generous, normally I'd spend over an hour teaching these answering skills, but a quick summary is:
1. Write as much as you can
2. Define everything
3. Relate everything to the case study, and even quote from it where possible
4. Relate everything to a real life example if you have one where appropriate, particularly if you can't relate it to the case study
5. JUSTIFYJUSTIFYJUSTIFY. This is the bulk of your answer.
Good luck guys!