You have to work hard for strengthening your XI topics along with preparing for Class XII board exam as well as JEE MAIN 2016. The basic thing for these exams is ncert text books along with it you can refer JEE MAIN exam point books available in the market. There are many good books for preparing JEE MAIN such as books by arihant publications, MTG publications, etc. Don’t forget to do as many as problems you can do in everday.
						

							
Youn need to stay focused on three basic and mandatory subjects like Physics, Chemistry and Mathematics,ake PCm your strength and along with that you need to locate previous year’s JEE question papers and their solutions plus do one more thing, keep visiting the official websites of leading institutions to check out the cutoff list of previous year, eligibility criteria, fee structure, placement record, pay package etc so that you gather the relevant information and are able to take the right decision for admission, you can try at –
 
Jadavpur University, Kolkata
Lovely Professional University, Phagwara
Bhagalpur College of Engg, Bhagalpur
JJTU Rajasthan
						

							
work hard as your are doing at present.
it is better if you read ncert books first.
you can use cengage materials which would be useful to you