For any exam, first of all we should have strong foundation in basic concepts. And my suggestion is refer your +1 /+2 (NCERT ) textbooks and that will do. Always read from the very beginning from the introduction on wards to get the real picture in the most interesting way.
- Most books may contain key words, key points, box, summary etc for your convenience.
- Try to work out as many problems as possible given at the end of each chapter.
- Write down exceptional or important points that may strike your attention.
- After each chapter, work out questions from previous question papers related to the topic studied.