Start with NCERT books, which are the base for JEE main. Build a strong base of the concepts and theories from NCERT books. Note that 60-70% of the JEE Main paper is based on NCERT books. Having a clear base of the syllabus is an important attribute for JEE preparation. Once you are done with these books, start referring to other books.
You have to study the concepts and topics of JEE level. It is more about time management, learning discipline, following a routine, and clearing the basic concepts well. If you appear for Foundation Course for JEE, you don't need to think much, just follow the classes and keep doing homework/assignments on time.
Be regular with your study schedule and JEE classes. Understand all the topics and concepts thoroughly in class 11th because in class 12th you will get access to most of the topics of class 11th. IIT JEE preparation from class 11 Benefits of starting class 11: Long continuous practice, no backlog, no hustle to complete the syllabus, ample time to solve more problems, better-made notes which are useful for revision Useful for, would be good.
Starting JEE preparation in class 12 depends on how good your class 11 concepts are. Did you study well in class 11th and complete all JEE subjects well? If yes, then the subjects of class 12 will be a little easier for you. On the other hand, if you have somehow ruined class 11th and have not studied properly, then you will have to work harder to complete the syllabus of class 11th and 12th in one year.
The more you revise, the more you will memorize. The revision will help you to remember important facts and formulas, which ultimately improves your problem-solving skills and accuracy. Never let your doubts be left uncleared. Clear your queries and doubts with your teachers, friends, or people who can help you. Make sure all the concepts are clear.
It is very important to practice solving JEE previous year's question papers. This will help you to get an idea of the question pattern and mark scheme from each topic. Solving previous year's question papers helps students to increase the speed of solving problems. Students can easily access previous year's questions and solutions online. You can also download these from the links given below for free.
Nowadays, accessing information from the internet has become very easy. You can use your computer or phone to browse different websites, which provide educational content and study materials. You can also see chapter-wise PDFs of all subjects, tips for preparation, video tutorial sessions, both live and recorded, etc.
You should always have a positive attitude. Believe in yourself. Always remind yourself what your goal is. You can listen to motivational speeches and also put such posters in your room. There will be times when you feel demotivated. Don’t give up hope. Eating healthy and exercising daily helps you to be in a relaxed mood. Don’t waste time on TV and the internet.
It is highly recommended to make your own short notes on a chapter while learning. This should contain important facts, shortcuts and main formulas. These notes will be very useful for you when you have only a few days left for the exam. You can revise these notes and memorize important points and formulas.