A starting point in revision is to identify the key topics that need to be covered. Below is a MindMap illustrating the key parts of the W200 Understanding Law course. Unit 8, on Scottish Law is not examinable - so I haven't incorporated it.
Once you can visualise the structure of the course - the next task is to draw out the key issues within each major subject. The way that the manuals are structured helps you do that.
For Example - Units One and Two make up "Introduction to Law
1 Introduction and what is law
2 Terminology and sources of Law
Each unit is subdivided - Unit One -
A General Introduction to the course - no need to revise this
B What is Law?
C The Functions of Law
Note the key themes and further divisions - B1, B2, B3.....
You might want to draw your own MindMap for each Subject and/or Unit.
Briefly summarise the key points as you revise - this involves condensing the information.