Dear Tapasranjan

you should cover your IIT JEE syllabus at lest 1 week earlier to exam date.

and in last week you should revise the differetnt formula of every chapter. and some tricks  that are very commonly used.

in last year i will suggest you to solver some model paper .

Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin