HOW 2 STOP THE TEMPTATION OF SCOFFING MY FACE!?

Im busy studying 4 exams at the moment, which leaves me at home pretty much the entire day! my mom has all these nice sweet n chocolates in the cupboard which no1 ever eats. So i am like permanatly wanting 2 eat EVERYTHING. not bcos im hungry or i like the taste, just cos i want it in my stomach. strange i no. im not puting on weight cos i exercise everyday, but i need 2 lose weight and me eating so much all the time is just not helping. SO PLEASE, any tips or advice on how 2 resist the "cookie jar"