JEE is all about basics - 1)First understand the problem and point what examiner wants to know and what all data has he provided.
2)Apply fundamentals. Don't follow shortcuts until you are thorough with basics. Mugging CBSE formulas wont help.
3)People conducting JEE are looking for talents who have understood the fundamentals till class XII, so that they dont trumble in IIT in atleast the basics.
Cracking the Examination :- 1) You have the brouchure, so just follow the syllabus by heart. They dont ask anything beyond that.
2) Hard work pays, but smart work pays better. So be smart in selecting your strong points which ll fetch you more marks.
3)Even if your one paper doesnt go as per your desires, dont let that get reflected in the rest . Dont be weak meantally.
4)Follow some good books. Other than HC Sharma physics, none of Indian authors are worth.