Grab yourself the HSC Success Past Papers for Mathematics
When you get homework, do all the exercises and try to understand the concept, then once thats done refer to the past paper books which references each page for each topic you do, so say you learnt quadratic polynomials today, do all the exercise for hw and do a bit of the questions in past papers, consistency in past papers will get things stuck in your head, because your school only grabs ques from past papers and sticks it in with slight modifications, besides the trial which is brought externally, other than that you dont need those 50 HSC tips or wateva ur just gonna overload ur brain with a shit load of textbooks which turns u off from the subjects gets u scared like hell, just your school text book and past papers book, and also a little notepad that you should be consistently writing your formulas or little nifty tips and tricks into, these 3 essential item is all u need for success in maths.