Without a plan it’s easy to revise whatever seems most attractive that day. Structuring revision is an absolute must if you want to cover all the study material in a short period of time, but it’s easy to just plod through the chapters in a text book.
Rather than rely on a revision guide or textbook that may not be completely accurate, it’s best to go directly to the source. In today’s digital age, it can be very easy to download the syllabus for your exam. This will give you a clear structure to base your study around, but it can also help you to work out the limits to what you should study.