Have you heard of the Pomodoro Technique?
The Pomodoro Technique is a time management method created by Francesco Cirillo in the 1980s. It is one of the best methods for study that I have seen.
You can find out more by visiting http://www.pomodorotechnique.com/get-started/.
You will need a kitchen timer or Pomodoro Timer. You can also buy the Pomodoro book, and I would recommend you read this over the school holidays to get yourself ready for the new school year.
On the Pomodoro website there is a video clip that explains the Pomodoro Technique in detail.
So, for this tip, I am not going to tell you anything, other than to visit http://www.pomodorotechnique.com/get-started/, get yourself a kitchen timer or Pomodoro Timer, read the book and start enjoying your Pomodoros. Practice a few times in the holidays, set yourself times to do some reading, writing and maths practice. If you are in Year 12, you can start using it straight away to get study time each day of your break and still have time for your friends, the beach/pool and relaxing.
It works perfectly with the chart you created in Tip # 2. As the Pomodoro team says, make time your ally.