Hey! I haven't completed the HSC yet either but am in a very similar boat to teddy123 - also 97% in my trial and above 95% for all other internals so I can offer you some advice.
100% agree with the above -
- Study skills throughout the year - DON'T neglect them this is where most students (at least in my cohort) lost the majority of marks in the trial exam
- Case studies and examples are everything - force yourself to enjoy them even if you really, really don't (I had to do that for intertidal wetlands aha)
- You hear it all the time but genuinely summarise your class notes as soon as you do them into easy to learn dot points or mindmaps or whatever works for you + case studies included
- Once you cover a part of the syllabus, find a past HSC essay question on it (like the person above said, there's heaps of relevant past papers bc the syllabus hasn't changed in so long) and write that, hand it in, get feedback, improve, etc. because if you smash the essays that's already 40% of the exam
Good luck!