If you need to make a proper plan for studying, then you should always start early. At least 4 months before the exam, make sure you jot down all the important aspects of the exam. How prepared are you? How much time do you need to give to each subject? Which subject is your strong suit? Which subject requires more time? How many CBSE sample papers class 10 have you solved till now? How many do you need to cover on an average each day? All these things will help you to map out your progress better and help you to stay ahead of the game. Find more tips here - https://medium.com/@genextstudent/tips-to-crack-cbse-class-10-exams-42899c8c78ab