Dear ganesh mirishkar
In IIT JEE 2009 380 marks was scoreed by AIR 17 student
you are aiming under 20 rank ,as you have already covered your syllabus 5 times ,then it is very much possible to achive rank under 20.
main thing is that you maintain your rythem .you have 4 month left.
I will suggest you to keep revising your noted time to time. and solve problems from new books also.
for more goods books you can check this link
http://www.askiitians.com/Important-books-iit-jee.aspx
and join Test series .where you can compair your prepration level with .and also you will know the possible changing pattern of IIT JEE as well as you will learn how to use your 3 hours in attempting the different portion of the paper.
Just stay calm and focus on understanding rather than mugging. Be regular in class and stay with concepts.Refer good books and always try to solve problems from magazines like MATHEMATICS, PHYSICS, CHEMISTRY TODAY .
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