Hello Hemaabi,

Following guidelines will help you to secure a good score for NEET even in a small duration of 40 days:

1)Manage Time wisely:

For this divide your day into 4 halfs and each half should be of 3 hours atleast,first half should be for physics,2nd for biology,3rd half should  be for chemistry and 4th half should be for solving objectives.A lways study the subject that you find difficult in the morning as you will be fresh in the morning so it will be easy for you to concentrate on it.As you know that every medical aspirant find it difficult so make sure you make it a plus point for you.
3) Good Study material :  I would  recommend you to go for NCERT textbook first as most of the questions are asked from it so make sure you go through your NCERT textbooks thoroughly as it will help you to make your basics strong . You can also use reference book to some MCQs for every subject like for physics you can opt universal publication,dc Pandey,Allen module,for biology you can opt trueman of biology,MTG,Allen module, Pradeep publication,for chemistry you can opt Dinesh objective,op Tandon,Allen module,ABC publication.Don't try to opt too many reference book as it will only confuse you so make sure you solve one reference book for each subject multiple times
4) Practice well: solve previous year question papers because sometimes questions are repeated as it is and it will also give you the idea that how the questions are being framed from each subject. You can also join Entrance 360 test series so that you get familiar with the pattern and learn to manage your time as time management is the most important thing for such competitive exams.