Dear student

First give the mock test, sort out the major topics there after segregate the five sections then mark topics.Consult a senior (if you have any), about how she or he prepared for this exam.Increase your study time day by day. Do not study whole day for the very first day of your start.Make short notes & revise them before your exams.

For the purpose of General Knowledge, keep a track of the latest news through newspapers & television media.Do not forget to go through NCERT books. Yes, mostly students skip the basic NCERT and try solving difficult level.

Plan your study and you will nail the exam 

Hope this helps

All the best !!!