You need only answer these questions "in your head", which means you do not need to write your answers down on a piece of paper. In this way, they can be done quickly and give you a nice foundation of conceptual knowledge as you move on to the YearEnd Review Package. Complete this in about 1 - 2 days.
This review covers the most important topics / questions of the Physics 30 course. I recommend that you complete 1 unit per day. Be certain to identify questions that you struggled with, so that you can get more practice on them during the "rest and repair" stage of studying.
These are exams that have been released by the government specifically so that students can get access to true diploma style questions. Be certain to complete them under exam conditions, which means "closed book" (i.e. no notes), using a proper formula sheet and cleared calculator, and using exam strategies that you would use on the real Diploma Exam (e.g. skipping difficult / scary questions and returning to them at the end).
The scariest questions on a diploma exam are invariably the scenario questions, where you are given a 1 page scenario / situation, and then you answer 3 or more questions related to that scenario. To do well on the diploma exam, you must be able to apply your knowledge to new situations, and the scenario question assesses this skill most effectively.
If you wish to achieve 80% to 100% on the Diploma Exam, I highly recommend that you try the exams below.
Excellence Diploma 1 Excellence Diploma 1 Solutions