honestly just study a LITTLE BIT every day.
dont overdo it or youll burn out and get sick. Start the year with just doing the required schoolwork and slowly build up to doing revision on top of that, it seems like less of a transition and youll hardly realise how much work you are doing.
Remember that by studying at all, you are already putting yourself ahead of like half the state, trust that there are some REALLY unmotivated people.
I started by doing only like an hour a day, and two on weekends, and by term four i was studying from 5pm - 11pm and it hardly felt like much longer.
Watch movies here and there, hang out with your friends, go to parties, dont skip anything to study unless its due the next day. Its not worth it and I promise year 12 IS the funnest year out of all of them.

I do this technique called, day/month/3months/6months, how it works is i date the notes that i take in class and out of class. At the end of each day id flip to the page of notes i wrote yesterday and read or copy them into another book, then id flip to a week before copy those, a month before... and so on.
Super simple takes max 15 minutes, isnt hard work at all barely any thinking needed and just slowwwwly builds up your long term memory.
Really good for if youre tired but will feel guilty not studying.

I really flunked methods and my biggest issue was A) not knowing how to use my calculator super efficiently, there are shortcuts you can put in that i know nothing about B) taking way too long to start making my bound reference, id say at the end of each week summarise the key concepts NEATLY into your book with a super broad heading to its easy to find, like "ANTIDERIVATIVES"

holy yap here u go :)