Perhaps you should consider the following advice in terms of each section.
Given that Paper 1 consists of unseen texts (both written and visual) and questions relating to those, you should practise analysing and responding to as many unseen texts as possible in order to support your analytical ability in preparation for the exam. Before doing this, you could revise the literary and visual techniques that you have gained exposure to throughout year 12. Extending this to the techniques explored in year 11 is not a bad idea and is also something that you may wish to consider.
In addition to effective preparation for unseen texts, favourable performance in Paper 1 will require you to ensure that you have a thorough understanding of your prescribed text, including the manner in which it conveys human experiences. This in turn means that remembering relevant quotes and techniques is also essential.
Once you are confident in your knowledge of your prescribed text, you should complete practice essay questions to support your preparations. It would also be a good idea to aim to finish your response in a timely manner, preferably less than 40 minutes because effective time management is important.
Module A and Module B:
Preparing for these two sections of Paper 2 requires a fairly similar approach to that of the Common Module, the only difference being the content (that is, ideas, themes and/or issues) of each module. Based on this, you should ensure that you thoroughly understand your prescribed text for each module as well as emphasise relevant techniques and quotes.
Completing practice essay questions and aiming to finish writing your response within a reasonable time limit are equally as important regarding those modules if you wish to maximise your preparations for Paper 2.
You should revisit your prescribed texts for this module for inspiration. This includes a focus on techniques and writing styles adopted by the authors of those texts, which you can reproduce in your own pieces.
Given that types of responses to Module C questions encompass imaginative, discursive, persuasive and informative writing, it is important that you familiarise yourself with each type of writing, which is crucial in the event that the Module C question specifies the type of writing to be used.
Additionally, you should practise writing reflections to your own responses since you may be required to provide a reflective response to your written piece.