• The first step you need to follow the exact syllabus of the JEE MAINS don't ever never divert your mind from that.
• For Chemistry try to complete the NCERT first and for Physics do complete the HCV and for Maths it will be RD Sharma.
• Try to be attentive and focus more on the content apart form the no of hours you are studying.

Hello Sumit,

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Fpcus on NCERt books and revise all basic concepts fundamental and solved problems only. Go fpr section mock test and then combined mock test to analyse where ypu commit mistakes and area sof concerns. 

Practice again and allot 8hpurs study daily as norm. 

Revise all weak areas again and silve and focus mpre on that. 

At last recheck all mock exams and practice final 3 mock exams in last month.