Remember, what not to study is more important than what to study. This fact is especially valid in JEE Mains. If you started to study more than necessary then, the chances of you getting confused will rise and it will also waste your time.
Sometimes the information given in NCERT and on internet /other books may differ. In that case, prefer the information of NCERT.
Every year, couple of questions come from the last chapter of NCERT in Chemistry (both11th & 12th). These chapters are relatively easy to prepare. Generally, students give less priority to these chapters, because of their low weightage in the exam. Don’t make this mistake, you should study these chapters seriously, as 1-2 questions (i.e. 5-10 marks) can make a huge difference in the rank.
Electronics topic is very ambiguous one in Physics. Don’t waste much time on that. Just study what’s given in NCERT and don’t go beyond that. Electronics is a very deep topic and at 12th level, it is pretty hard to understand. So, it’s not worth much effort as its weightage is mostly one question. It will only waste your energy and drop your confidence. Study smartly, know your weakness and strength.
You have to solve paper smartly also. Always remember — it’s the number of questions you do correctly, matters not the standard or quality of questions. So, first review the paper and get the idea which portion is easy and start solving from that part. Leave the hard questions and attempt it later. If you start to solve hard questions first, then you will be able to attempt very few questions in starting time, when you are at your peak efficiency. It will cause panic in your mind and you will start to make very silly mistakes.
Generally, students have their own order of the subjects to attempt in the paper, suitable to their skills. But it is advisable to attempt Chemistry first in Mains paper, as it takes about 30 minutes to finish it. Then you attempt Physics or Mathematics, whichever suits you. Try to fill OMR sheet along with solving questions, and do it very slowly because making errors in filling OMR is the silliest and dumbest mistake you can make in the exam.
Well, that’s all the advice and tips I can give you for the exam. Rest is up to your hard work, focus, and determination to achieve your goal. Enjoy your studies! Best of luck!