Hey dude!
Yeah, totally felt what you were faced with back in year 12, since I finished Methods at a similar time

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- I spent a fair bit time writing up my bound reference (which ended up being more like course notes rather than exam notes - I ended up putting quite a bit of detail on it). I didn't end up using any of it in the exam (which is expected, of course!), but writing the whole thing was a great revision task and I felt it was really helpful in consolidating a lot of the trickier concepts.
- Have you considered helping out some other students in your methods class with topics they may be struggling with? Since I started teaching after graduating from VCE, I've learned
so much more about small things that pop up along the course - not only are you helping others, but in helping others you're also being put to the ultimate test of
actually how well you understand your content

- I'd have to disagree with Quantum44 on the topic of papers - I didn't do a huge stack of papers for Methods back in the day (about 35ish full papers (Exam 1 and 2 count as one), and I did fine. It's not the number of papers that matters (in fact I think doing more than 50 isn't going to be that useful), but the
quality of each practice paper that matters. Since you've got the time, why not spread out your practice exams a bit more (on average I think I did about 1 set a week, and stopped entirely for some periods to focus on other subjects).
- Probably not a popular opinion, but personally I spent some time during Year 12 to learn about other topics in maths just for fun. If you like maths, why not do a bit of exploration? VCE Methods is just the tip of the iceberg =)
Hope that helps!