If you are unsure of 'how' to revise then these pages will give you some inspiration for creating a variety of tools that will help. The process of creating the resource is revision in itself but you will need to ensure that you are testing yourself and revisiting the content regularly.
You need to find the best way for YOU to revise. Hopefully, you already know how to revise from preparing for modules and other examinations and assessments. If you are unsure, try a couple of the methods and see which one you find the best.