The one thing I would make sure to do is that you get a Tax File Number (TFN), if you haven’t already. It’ll be super helpful if you want to go to Uni, get a job or both. Three other things I’d also do during this time are celebrate, do things you weren’t able to do because of school, exams, etc. and help others by providing your notes/ assistance here on the forum.
Definitely want to second this! Your TFN is everything and now is the optimal time to get all of that sorted out. Even if you aren't job hunting yet, writing up your resume is another thing you could do should you decide to look for work soon. It'll save a lot of time down the track and you'll only need to update it here and there
You could also go driving lots if you're on your L's and get the hours if you haven't already! Once the year picks up, it might not be as easy to find time to so explore new places and go on new roads while you can
I'd also arrange time to meet up with friends from high school to meet up and hang out. Arranging times to meet up becomes incredibly difficult once uni and work start to kick in, especially if your times don't align. There are quite a few good movies to watch or you could go bowling (they have great holiday discounts!) The possibilities are endless
Congratulations for finishing your exams and final year; now's the time for a well-deserved break!
Angelina