Doing the LAT too! With less than a week left until the big day, I recommend; aside from the LAT sample paper, practice alot of spontaneous writing i.e. writing under pressure from the top of your head. After all that's what the LAT is all about, how well of a response you can make by extracting information from unseen texts/extracts. Expand your vocabulary, meaning learn different adjectives, linking words, verbs etc, and in what context is it best to use them. Touch up on your grammar skills, you'll be suprised of how convoluting some sentences in your writing may sound. Don't forget the goal of the LAT is to show the markers that you can produce a strong, cohesive and fluent piece of writing, showcasing ideas you've developed from viewing the prompts. Personally, me preparing for my english HSC (and basically any other non-math subject) in the upcoming month also kinda helps - writing/editing essays. If you're the occasional book reader, then that helps alot also. Other then that there really is no magic shortcut method to ace this exam, just simpley get better at writing from now till the LAT through what was mentioned above. I only decided to do the LAT this year also, so yeah. Considering it's in around a week, and you're in the transition period from yr11 --> yr12, I'd say it wouldn't hurt to go all out and focus MAINLY on the LAT. (ofc not saying completely neglect your other plans). Just as a side note - the median atar and lat score combined that got into unsw law last year, was around 98 and 72 respectively. However smashing the the LAT and getting lower than the median atar (<98) can still mark you as a competitive candidate for law and vice versa. So yeah, good luck this year, and don't worry too much if you don't get as good, you still have next year, and by that time I can almost guarentee you that your english writing ability will improve ALOT.
