Hii..

Firstly you should go through the basics of class 11th & 12th then try to solve the previous year question papers as well as mock test series..

All the best..!!!

Hello Kolli
Yes the preparation of old papers is quite useful for JEE Mains 2018. Going through them will help you in understanding the pattern, the difficulty level, the distribution of topics amongst the various sections and the importance given to various topics in the exam.
Hope this helps.
All the best ! 

Dear Rajashekar,

first,dont fear for the jee exam,

dont think that it is soo difficult that u cant achieve,

practise more old papers

On conceptual purpose and for your accuracy purpose those papers are helpful to you,

sorry to say that , you may not expect any questions from old papers

prepare NCERT textbooks more....

-All the best!!

Hello Killing,

Don't loose hope. If you have prepared well then you don't have to worry.

Previous year paper are very useful for JEE preparation. It give you an insight of paper trends.

practice as much as you can.

Mug up all the theorem and concept. don't study any thing new.

Keep revising. Attempt Mock test, It will guide you to adopt perfect time management in examination hall that will surely boost your self confidence.

Stay Healthy 

All the best.

preparation on old papers gives you a good result ,you will get know what type of questions are giving in the question paper and it will develop self confidence .

on my knowledge ariharant publication gives perfect questions and there is a myth like in jee mains more bits are coverd from ariharant publivation books so well start you revison with pre year papers and there is nothing to be tensed feel like a normal exam in your class and attempt it all the best