Straight up just doing practice exams. It's like a cheat almost; knowing the content is a third of the course, perfecting your exam technique is another third, and putting up with your teacher's dumb biases and mistakes with SACs is the other third (lol). It's basically rote learning; a worthless and annoying skill in the real world, but for whatever reason the education system here is rigged for rote learners to do well.
You want the idea of doing the exams to be very, very familiar. Doing a ton of practice exams also slowly filters out what you don't need to know, and hones your memory into what you do need to know. Doing exams from third party sources also exposes you to "bull**** questions", which are essentially questions very badly worded or not on the study design but you accomplish anyway; this unfortunately happens in some actual VCAA exams. A side note, oh boy, if you want to try out bull*** questions you have to try out the ITute exams

They're essentially medium to hard difficulty whilst having horrible wording compared to actual exams, but who knows, something like that could pop up.
Another side effect is that if you do tons of practice exams, the actual exam will be a breeze since you're so used to doing well on tons of practice exams rather than doing just 1. There is the obstacle of not getting burned out, but I'm luckily in a situation where I just
know I have to do well, since I go to a bad school, currently don't have a permanent desk or study area, and haven't worked extremely hard all year like I should have.