Hey! I just graduated this year and we happen to have the exact same subjects!! Just in different orders.
I straight away know we have a somewhat similar mindset as we both do the same subjects, and hate english!
Health - Lots and lots of practice questions and get them marked!! If you want to do really well id suggest knowing some answers to questions that you can apply to almost any situation your given. EG I would often link back to increasing governemnt funding, increasing income, reducing likeliness of disease, things like that. Mind maps are also very helpful with this as well. Use the examiners reports as health can be very annoying, as you would have seen with bio 3/4, with the structure they like with answers.
Chem - Try to go over content before your teacher covers it in class. I had a tutor that was a week or two ahead of my class so it meant I was familar with the content once it got to class time, but this is definately achievable on your own so i 100% recommend. Try your best come exam time to get the calculation questions done quick and easily. Because you do methods you would obviously have some kind of strong mathematical understanding, use this in chem and it can be a lot more helpful when working with the numbers. As for worded answers, i just looked through heaps of examiners reports til I was confident with most of the content covered in those longer answers questions. You'll also see very queickly that every year the chem exam has a very similar format so use that to your advantage!
Methods - I didnt do incredibly in methods but was still around top 15 at my school. I used vic maths notes a lot for methods to do past exma quesrtions before each sac that helped a lot. I foudn the chapter questions were not useful at all so once you have a bit of unerstanding id move onto exam questions.
English - I hated english with my whole life. Enough that I was so petty I didnt do one practcie exam for it. The only thing I have to say is that english brought down my atar a massively!! I always knew that it would although I made the choice that I would rather get very high scores in my other subjects and completely ignore english than do pretty good or average in all of them. So do be warned that even if you dont like it, I do recommend studying for it. (Although if the rest of your subjects carry then it doesnt matter that much)
Good luck!!! Im also selling old study design hhd notes at a reduced price of $10 if your interested, they contain lots of tips and sample answers also to helpπ