Follow these steps, during self preparation you need to be quick in deciding your options or sources to study or else you will end up in wasting time . 1. Analyse the last year question papers and evaluate yourself. How much you know and how much need to work on yourself. 2. Decide the subjects in which you are strong and in which you are weak. Work on them. Work on every detail you can find. 3. Make your own notes and cram the formulaes. Make short notes for quick revision. 4. Read standard books , dont follow any university book. Read standard books. 5. Revise again and again. Good Luck!!!