In January's jee mains i had NTA score of 83,and i want to improve it drastically in order to get a seat in a top NIT,how should I prepare?

Hello aspirant,
Your NTA percentile is good.
To get top nits you should do hardwork.Start preparing some important topics.Some steps to secure good percentile are:
1.Do not start learning new topics.
2.Revise the topics which you have learnt already.
3.Practice previous papers.By doing this you may get idea.
And some more tips to improve your NTA percentile will be available in our careers 360 website.
So please go through the link.
http://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-2019
All the best!!!!
Thank you!!

Hi dear

If you want to improve,see your strong subject and try to make more marks from it also work on weak portion,work hard on chemistry it will give you a good marks.Revise all topics and solve previous years question and mock test will boost your rank.Follow this link you may find something helpful

https://engineering.careers360.com/download/ebooks

Thank you