1. Be sincere in your efforts
2. Practice from limited and standard books likeSL Arora HC VERMA, etc. Dont do too many books. Do limited books, and do it more number of times. Become perfect in them.
3. Get a good Guru, if you can find ! Guru is the person who knows what should be done and what should not be done. He/she is the best guide.
4.Focus more on previous year questions of NEET ,AIIMS
Self study is definitely most important. But coaching really helps you score more
Chemistry: NCERT most important. Other than that, for reference, use OP Tandon, Pradeeps, Morrison and Boyd etc
BIO: Start with NCERT, . Then go ahead with previous year questions. You can also refer to Trueman’s.
Physics: Start withSL Arora HC Verma. Then go ahead with previous year Questions directly. Dont go for any other crap books.
Practice previous year questions MANY TIMES.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.
Best Wishes :) :)