I have trials before the holidays...so thoughts on what I should do during the holidays both to relax and to get on top of my work?
If your trials are on the last few weeks of school then for the 7 days following, you will not even want to do work. If you properly prepared for the trials, you will find that it was somewhat draining. And the exams throw you out of it.
So honestly take a break. After 7 days or so, you can resume your usual holiday studying methods for one week, then back to school for one last term.
[Personally, I did virtually no study (except for work the teachers gave, so rather no personal study) between the trial block and the last day of term 3 because I knew I had four weeks to gun out preparation for the real HSC]