One mistake I made was of buying too many books. Never do that. Stick to one till the very end and master it.
For Physics, I found Universal Self Scorer (Errorless) to be good. It’s theory is also adequate and appealing.
I do Chemistry from Errorless too. Don’t read Chemistry theory from it. It’s too vast and not necessary. For theory, NCERT Chemistry is the best.
For Biology theory, I’ve considered Trueman’s Elementary Biology as my Holy Book. It’s written in layman’s language and covers each and every topic that is dodged away like anything in NCERT. And it has beautifully helped me improve my Biology. For Biology Objectives, again I go for Errorless Biology. Again don’t refer it for theory, only objectives.
Solve 29 Years. (Previous year question papers of both JEE Main and NEET/AIPMT)