sir what should i do if i have completed my syllabus in october for NEET and i am want to have that padhai vala danda on my head..

If you are done with NEET syllabus by October, This is good for you, Here are some points given below you can follow :

Set your routine in a way that you target the difficult ones first and then go to the ones you can handle well.
Prepare well, master with basics, keep revising. Make notes of important formulae and equations while studying. Once through with a chapter or concept, attempt the sample questions based on it.
Since the exam will be devoid of any direct questions, it is important to give an honest attempt to learning and understanding the content.
Keep giving online/offline mocks. Work on your strengths and weaknesses. Analyse your performances. Give enough time to weak areas and master them.

Good Luck!