In 1 month it is better to go through the basics in all the subjects topic wise. It is difficult if u practice problems now

The books which I used for JEE -

PHYSICS -

HCV ( for practicing )

DC Pandey ( for theory and concepts )

Your coaching packages ( never underestimate them )

MATHS -

ARIHANT SERIES ( all of them of Indian writers , maybe you can leave the alzebra one ) I consider them god of jee maths , follow them by heart you will see the magic .

Your coaching package , if needed but the upper point is sufficient .

CHEMISTRY

For chem there is no specific book , I suggest you should follow your teacher .

And solve your coaching packages .

But if you really want for org - Solomon and fryhle , phy - RCM .
Also

• Mastery over the concepts is what contributes to success.

• Study daily for the hours fixed by you  so you might not suffer from pressure at the eleventh hour. Stick to your time table.

• I think, you should study for the advanced as soon as you grasp the concepts. First practice the JEE mains level questions and then try solving the questions of JEE advanced. Otherwise, I don't think you would be able to get ample of time separately for the JEE Advanced.Why to take the JEE Avanced as a havoc if you are understanding the concepts well?!
• Don't underestimate the easy questions. Keep practicing them too.

• Have discussions with your friends.

• Read interviews of toppers to know their strategy.
• Keep yourself motivated.

PRO TIP -

Never get demotivated .

Do not waste time in searching for extra books , the ones I have mentioned are sufficient or maybe you should ask your teacher .

Just be confident always!

All the best .

Syllabus of JEE Main is based on 11th and 12th class NCERT books.

Make a proper and almost fixed routine for the last one month. You should not keep waking up till late at night. Also, you must make it a practice to wake up early in morning, say at 6.00AM.

Make sure you give quality time to your studies. 

To prepare simultaneously for board exam and JEE Main, thoroughly practice from NCERT Text book and solve the exercises rigorously.

In the last 10-12 days after board exam, practise as many as multiple choice questions as you can.

Studying from NCERT is a must, but not sufficient for the exams. It contains good set of questions, but the theory described is brief. You must refer to one good textbook for problem practice as well as theory. 

By now, students should be thorough with NCERT books and exemplar along with rigorous practice through solving JEE Sample Papers of the last five years in order to get a gist of the pattern and complexity level of the entrance exam. Students should solve at least 15-20 sample papers before appearing in the entrance exam.

All the Best!!