The first advice would be to solve your DPP or CPP modules which the coaching centers provide as those are well referenced from previous exams. After that, apply for a monthly or a weekly test series by any reputed coaching institute. These will gradually point out your mistakes and prepare you for the final exam. Give preference to solving questions rather than reading the theory.
The books which would be good for the preparation are: -
Some additional preparation sources other than those mentioned above would also prove beneficial. Solve questions of previous year’s JEE exams so that you can get the command over Physics and Chemistry. Moreover, practice organic chemistry a lot since it takes most of the time in the Chemistry section.