In order to start your preparation make sure you are aware of the complete syllabus, exam pattern and important topics. You should always choose a correct study material. You can also make your important notes which will help you at the time of revision

You can make your time table. Set your daily and weekly  targets. So, that you can cover your syllabus on time.

Refer previous year papers to understand the exam pattern and level of questions. Solve as many as mock test series to analyze your preparation level at regualr interval of time. Work on your strength and weakness.

All the best for your preparation!!