1) Develop a habit of reading newspapers, magazines, novels etc to improve your vocabulary.
2)Go thrugh the syllabus and exam pattern thoroughly.
3)Be in touch with the current affairs and events that are making news.
4)Make sure the political and historical scenario of India is on your tips.
5)Study regularly and revise the concepts on regular basis.
6)Make notes for revision while studying different topics.
7)Be positive and confident
8)Know you strengths and weaknesses and work on them constantly.
9)Solve previous year papers, they will give you a brief idea about the exam pattern, types of questions,etc