attempt several practice tests
You can find out the IITJEE syllabus from the IIT website, and use the following books for preparation.
Physics: HC Verma, Young & Freedman(used at MIT, USA), “Problems in Physics” by Abhay Kumar Singh
Inorganic Chemistry: JD Lee, OP Tandon
“Physical Chemistry” by Robert A. Alberty, Robert J. Silbey (both from MIT, USA)
Organic Chemistry: Morrison & Boyd, Paula Yurkanis Bruice
“Calculus:graphical,numerical,algebraic” by Thomas,Finney, Demana, Waits (one or more authors from MIT, USA)
Arihant Integral Calculus, Arihant Differential Calculus, Arihant “Vectors and 3-D geometry”
Trigonometry: SL Loney
Coordinate geometry: SL Loney
Algebra: “Challenge and Thrill of Pre-College Mathematics” by V. Krishnamurthy
						

							
no you can''t crack it if you are not a brilliant student because iit needs intensive training and iit also has tha tag of toughest exam .but if you belief yourself then you can crack it with full efforts but with regular self studying of 15-18 hours per day. jee 2013 will have almost 13 lakh candidates and think where you are, you''re nothing so sapne mat dekh aur dukan khol ke 5000 rs kama mahine key samjha be tere bas ki baat hi nahi wo bhi 6 mahine mein. acche acche ni kar paate iit toh tu kya scientist hai ya einstein or genius be tujhe toh anand kumar  hi shayad bacha le chale.
 
regards,
student of class 25
 
just joking bro don''t take on your heart you can do just belief in yourself