Yes, if you think that you need to me more preparation for admission in the IIT through the JEE, if you will drop a year after 12th for preparation of IIT JEE you should work hardly and very smartly, and make it sure that you will not waste this year. Here I am giving you some tips which will help you in cracking the examination:

Understand the examination pattern and syllabus from original sources
Continuous effort is needed for a good preparation.
While you continue with the self study, don't forget to prepare handy notes side by side
Pick up question banks available in any book store near your house and practice
Always try to clear your doubts and queries about any topic way before the exams
Use the internet ONLY for study purposes
Remember that JEE is not a test of your speed or hand writing
Spend lot of time while solving each of these problems that you attempt from the question banks
Open your notes from classes you attended and go through the good problems
Only read the theory from your lecture notes only


preparation book of IIT JEE