Personally, I have tried studying ahead in the holidays and it doesn't work for me. Physics in year 11 and year 12 is harder to understand than the physics in junior science. You will notice that it would require a lot of "visualising".
But studying ahead might work for you, if you're like anomalousdecay and can "solo' everything.
Anyways, one thing for physics that is important and doesn't change is SKILLS:
1. Make sure you know what a line of best fit is. Sometimes there's "curve of best fit". Just figure out if the gradient is meant to be a straight line or not.
2. Do you know your difference between Validity, Reliability and Accuracy?
3. Do you know your difference between Control, Dependent, Independent variables?
4. If they ask you "how can the validity/reliability/accuracy of this experiment be improved?", will you be able to answer you? Once again, you need to know the difference.
Pinpointers (make sure you develop a habit to be cautious about these):
1. UNITS - all answers need units. They will take a mark off if you don't. This also applies for vector (I think you should have learnt this in year 10), vector needs direction. Once again, marks would be taken off if missing.
2. WORKING OUT - in physics, you NEED to show your working out. If you get the answer correct without working out, I believe they won't give you full marks. Someone correct me if I'm wrong for this.
3. LEARN YOUR KEY VERBS - these are important.
4. DON'T BE AFRAID TO USE DOTPOINTS/TABLES TO ANSWER QUESTIONS - they don't take marks off for this. In fact, it's easier for the markers to know where you can get marks.
In your position, what I would do is perfect the skills and don't worry too much on the content.