Here I am giving you some preparation tips for police Sub inspector examination below ..

You have to starts preparation as soon as possible..
First of all you must know complete syllabus and exam pattern of Sub inspector examination. You must give at least 10 to 12 hours per day for studies. You can also join coaching classes for of police Sub inspector examination

Then you have to give more attention for important topics of Sub inspector examination. You have to make notes for important topics of Sub inspector examination and revised them regularly.
For better preparation you have to solve the previous year question paper of Sub inspector examination or you can buy books for it