Dear Anshu,
As you dropped year and you have completed your 12th ,you have whole year infront of you to work hard and secure a rank in top 2000.First of all,as you are good at maths,dont ignore maths,give it a good amount of time daily,and always keep practising.Chemistry you shoudl study a, lot remember a lot,so give a bit more time than maths.Coming to physics,First forget what all you read in +1,+2,start right from the basics,understand each and every topic carefully without leaving a single topic,i suggest you read HC verma,read it throughly,solve EACH and EVERY problem of it,do this for every chapter,after your are done with HC verma(I&II),Do some problems from Arihant.as you are good at maths,you can easily understand physics.In physics you just have to visualize every thing,Imagine how it happens in real world,thats it.
GOODLUCK
Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.
Win exciting gifts by answering the questions on Discussion Forum..