heyy,
umm, studying ahead would probably be a good idea, but just bit bu bit each week, don't want to burn out.
I'm doing an accelerated program with my school so just started the HSC course this term.
We use cambridge txt's, and I find them really good. Some time's the explanations can be a bit wordy.
Try getting the Excel books, really helpul with the syllabus dotpoints.
If you got any questions on the stuff you're getting ahead on, PM me cause it would be good to help me remember stuff from earlier in the year and hopefully it will help you out.
Plus i see you're doing alot of the same subjects except for physics and SDD, where I'm doing Bio and Jap continuers.
good luck