Mathematics & Mathematics Extension 1: Using our best friend Fitzpatrick would do the job.
Chemistry: Typing notes up & reading, memorising & past papers & Dot Point. Perfect study routine!
Biology: Typing notes up & reading, memorising & past papers & Dot Point.
Another perfect study routine!
English: Reading a large variety of texts (e.g. newspapers, novels, poems, etc.)
Business Studies: Typing notes up & reading, memorising & few questions in the textbook & rereading to fresh your mind up
SOR I: Copy & paste the notes from BOS into the Word Document. Just study like there ain't tomorrow.
By the way, make sure you follow syllabi (or syllabuses). Consistent studying is the key to success!