Strategy for theory subjects-ipcc

I m a student of IPCC level. 2 months later v hav our exams. Can anyone plzz suggest me a sustainable strategy to cover all the theory subjects in a lesser time. like wat shud i do?? read the topics again n again?? or stick to.practise manual strictly?? or shud solve all past year questions n stay confident that some or d other, questions ll b common?? plzz help.