During the year, in class make your summary book on binder paper. This way you can add in/take out papers you need or don't need at the end of the year. This way at the end of the year, you already have your notes made and can just do practice exams.
Another thing I found extremely useful was to make a single summary page for core and your three moduals before each sac and then when binding you summary book you an place these at the front. Theses summary pages could contain certain elements you forget/struggle with and important formulas.
The key with further maths is to do many, many, many practice exams. I ended up doing 50 although u would have liked to have done 60 had I had enough provide or available to me.
By creating a summary book throughout the year, when it comes time to study you would have already done the formalities and have time to refine your skills. It is a waste of time re-writing notes you already have in maths. Trust me.