OP Tandon is good and famous. You can follow that. This is however what we recommend:
JEE Chemistry: NCERT most important. Other than that, for reference, use OP Tandon, MS Chouhan, Pradeeps, Morrison and Boyd, Himanshu Pandey, P Bahadur, SN Sanyal etc. Other books from GRB and Arihant are also good !
Practice previous year IIT JEE questions MANY TIMES (You can use Arihant 39 years for that ! ) . Become perfect in them. Solve other people’s doubts. These will help you score better :). People run after so many modules and crap test series. Instead you should focus on limited material and do it more number of times !! Many questions ask only basic concepts but a good clarity in them. Self study is definitely most important. But coaching really helps you score more
Mantra: Arise awake and stop not till the goal is reached 🙂 ~Swami Vivekananda
This is what Bruce Lee used to say: I do not fear the man who has practiced 10 thousand kicks once but the one who has practiced 1 kick 10 thousand times ! 🙂 So do limited things and become prefect in them !