I'm of class 2006 but I sat for my IPT HSC in back in yr10 (2004). The mark I got didn't reflect my true capabilities. So from what little experience I have of undertaking a HSC course, here's what I have to share:
1. Don't forget or ignore your friends. You'll need your friends and they'll need you to support each other throughout the year.
2. Pay attention to your teacher(s) in class. Your teacher may be filled with a lot of bullcrap but you will regret it if they said something important and you weren't listening.
3. The moment you receive a task, get straight to work. This might just mean figuring out what the question is asking for.
4. Share notes with your classmates. Ultimately, if they do well, you'll do well to. Also, teaching is the most effective way of learning.
5. If you want to get BETTER marks, make your work unique by using external sources. I know this may contradict the previous point, but I guess you just have to be selective of what to share then.
6. Read over notes covered in class each day before starting on your homework.
7. Make your own notes and summaries on a regular basis. This will help with your revision and make it easier for you when it come to revising for assessments.
8. Set a goal and break it down to smaller goals which you can achieve a bit at a time.
9. Studying can be a bore so try to familiarise yourself with material using different methods. eg. quizzes amongst friends, flash cards, etc. Alternatively, study in different environments; try an empty classroom, the local library, the park, etc.
10. HAVE FUN! It's alright to be stressed, it keeps you alert, but you must remember to relax; go out and party, hang out with friends, do something you like. It's easier to study if you are refreshed.
I hoped this has helped... This is also kinda a reminder to myself of what I can do to help me achieve my goal. Cheers!