After a term and a bit of further maths, the best piece of advice I have found so far is that a good bound reference helps a shitload. In my past two sacs I have only done about 3-4 practice questions outside of class time, and apart from that my only revision has been making my bound reference in the two days before the sac and it has worked very well. On every sac I know that all I need to do is follow a step by step process on my cas that will be outlined somehwere in my bound reference and I'll get the marks. Hardly any need for real study.
In saying that though, don't fill your reference up with crap you're never going to use. Keep it simple and concise and easy to navigate.
In my opinion and experience, you shouldn't spend all your time in revision on making your bound reference. Myself and most of my classmates found that we did not even use our bound reference in the exam, with all the important stuff being put onto it, you should be able to remember most of it. Therefore, you shouldn't depend all on your bound reference. What you should mainly do is do AS MANY practice exam questions so that you get used to the format of the exam in preparation for it. Yeah, spend some time on your bound reference but make it WHILE your doing your practice questions, as you can know what you got wrong then put it onto the cheat sheet. You should really remember most of the stuff your getting wrong, revise it and make sure you know how to do it. Also try to include some practice exam question formats so that when you encounter them in your final exam, you know how to tackle them and don't have to spend all your time trying to figure out what exactly is being asked. Just don't depend on your bound reference, because referring and finding some of the stuff in it can really waste your time in the SAC and exam and if you do a lot of practice questions such as the ones on exams, further maths checkpoints etc. they will help you heaps in preparation.