Hi dear,.  
            If you want to qualify any above-mentioned exam ie. NEET, AIIMS, JIPMER the strategy is very simple. You have to be more focussed and should have proper conceptual knowledge. Go for deep studies rather than referring notes. Make self notes by studying from book first and then writing them properly. Then revise them thoroughly. Refer syllabus first of these entrance exams and mark the topics from the book and study accordingly. You can refer youtube channels for help.Give at least 9-10 hrs to study. 2 hrs to refresh yourself. Play any sport side by side. Wake up early and do some activity like jogging, running,cycling etc. Then study.
All the best

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