When revising, it is important to make sure that you are spending time focusing on things you are less confident on. A RAG list or PLC can help with this. 

These documents contain a list of all the topics you need to know for each subject (sometimes over more than one document). You can rate your own knowledge for each topic and then focus your revision on the Red and Amber areas. 

Personal Learning Checklists (PLCs) also contain links to resources  that can help to address any priority areas.