Dear Karthik,
As there is lot of competition today, so coaching is a great help and gives you proper guidance ... but it does guranty your admission ....as everything depends on you that how to make best use of it.. Self study for 6-7 is must.
If you want to join some good coaching centre .. i will advise you to join askiitians online coaching.. as u will be able to save your time.. all you need is head phone and net connection.. study acc. to you..
check out the different packages :
http://www.askiitians.com/packages.aspx
Now you can win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
Regards