With 8 months to go, you should now be sure of how to structure your time for the topics you need to study. You should also avoid making some of these mistakes that JEE aspirants generally make - this can help you save time & prepare efficiently.
Unsure of what books will help you prepare the best? We've got you covered on that.
Even with all the books, remember, that it's important to start preparing instead of just accumulating multiple books to study from. Your schedule should also contain the book you will be using to study the topic that you want.
All IITians will tell you that practising previous years' papers' is essential for JEE preparation. This helps you understand the style of the questions asked, and to be prepared for when you attempt your JEE paper.
IIT Madras had last conducted JEE in 2010. Have you practised questions from JEE 2010 paper?