Cannot understate the importance of understanding content in legal! Go through your textbook (at least for the first couple of dotpoints of the study design), read and get a feel for the content. Also, keep up to date with legal advancements that have occurred recently (e.g. The Age/Herald Sun articles) as you work your way through the year these will make more sense and really enrich your responses, so you do achieve higher (or full) marks on those nasty globally marked questions.
Also review what key task words (e.g explain, evaluate, analyse, discuss) mean, the sooner you get use to these the better.
As someone already replied, read the study design!! It really will be your bible throughout the year. Go through both the skills and knowledge listed so you'll know what's expected.
Making sure your handwritings in check would also be great, as you start to do practice exams (and even sacs) you'll be so thankful if you can write fast. Legal is, unfortunately, one of those subjects where you will be expected to write a fair bti within a short time, and ensuring your writing is legible and you get down all the points is a great way to ensure a 40+!
But have a break! Legal is a very demanding subject, and you'll need to be rested to do well.