Do billions, millions of past papers, ever minnute of your day should be with past papers, even when you sleep look at your notes, when you wake up do past papers, atleast 1, every morning, 2 ever afternoon, 4 every night for each subject, never stop. This is the only way you can get above 90, because here is the reason, when you study your notes, how much of the information do you remember? So if you don;t do past papers than you want get above 90, becasue you want know the questions, guess what if you do millions of questions, you will likely to see the same question, hence you can anser it properly to get full marks.
No one told you, I know... smart kids will never tell anyone how they study, never, never. Why? becasue they do millions of questions all day, and study 24/7. This is true, even if you go ask them, they will tell you, I don't study, which is bullshit. you know that, right? So study, study, study and do past papers, you can't really do any thing else.
When I ask some smart kids, how do you study? they answer, I don't study, wtf- how would you expect someone to get good marks if they haven't opened their book, which is stupid, for a smart person to say, I study, cause if their class mates find out, then they would study more and bet the smart kid.
So the key, to study hard, forget about people distracting you, trust me forget about you teachers, cause you will never see them again, what matters is getting into you course. thats what I care about, doing my best! Because teachers don't give a shit about students, all teachers I seen especially at my school, which is the shitest school.
I remember when I sended my essay to me English teacher, she was like a ?, she told me before I send here I need to edit my work, what the hell, she is a teacher isn't she! What is here job? Why is she at school? What is here responsiblity? Yes, thats right to teach and mark students work, so it is these type of situations that brings I student down, not get their Atar although the worked hard, becasue of some teachers marking their work wrong.