Hey, everything Liuy has said is great stuff; I used the Nelson textbook so maybe I can also offer a bit of advice from a different aspect.
I got a study score of 46, was aiming anywhere in the 45-50 range so I'm extremely happy I achieved that. I was ranked no. 1 overall for sacs (probably about 2nd or 3rd overall for unit 3 and 1st or 2nd for unit 4, but overall no. 1 through both units). Recently got my statement of marks. My unit 3 sacs scaled to a score of 99/100, while my unit 4 sacs scaled to a score of 100/100 (was in a cohort that got around five 45+ scores including one 50, and about ten 40+ scores so quite a strong cohort for PE, tbh probably best ever in our school lol). For the exam my score was 102.5/120. I made about 2-3 marks of stupid mistakes, the rest was probably not enough detail in longer response questions - I didn't get 0 marks for any question, except for 2 of the multi choice I got wrong. Most marks lost were like getting 6/7 for the long answer q, or 3/4 for the last question. Also note, however, that the A+ cut off for this year's exam was higher than previous years. You can find that info yourself when it is released on the vcaa site next year.
I read through unit 3 and answered all the questions on the holidays from Nelson. I finished unit 4 on the term 2 holidays. I did this because I was in year 12 and also had 4 other subjects + the umat to juggle, so after I did this I was able to forget about PE for a little while. If you're in year 12 I would recommend a similar strategy so you don't neglect your other subjects, if you're in year 11 I guess just concentrate more on finishing earlier and getting top rank in sacs.
I set out a goal of doing heaps of practise exams for PE, but when exam revision came, I found most of the exams sucked so much for PE, plus the new study design made it difficult, plus I spent lots of time writing essays for English. So I mostly focused on all the vce ones all the way back to 2002. Basically for most people, if you're aiming for the very top in PE, a lot is down to luck whether you get 40-45, 45-50. Just do your best and work hard. One thing the exam writers love to do though is 'trick' people who don't read the question, so make sure you read every word carefully; I did that on the exam and it saved my ass. Feel free to ask if you have any other questions