During your JEE preparation, you will have to face many barriers and to be successful, you need to tackle them wisely. Many people start the preparation with a huge energy but soon get distracted - malls, friends, family, cousins, relatives, girlfriends, boyfriends, cigarette, drinking and a bunch of other stupid things. Seriously, I would say that "Shut your brain for everything else and bang your head on the books!!!"
Everything will be yours if you get a decent rank in JEE and i promise you that your relatives would be the first one to "taunt" you or better "leave" you if you fail..!!