Eliminate temptation from your house and go over your diet plan you shouldn't starve yourself but eat small meals to maintain good metabolism,try almonds and a lot of water,loosing 13 pounds will require a lot of exercise just think what you do to loose it and if having a chocolate is worth taking two steps away from your goal just for 5 seconds of taste, apple taste great too!if they don't fill you up add seeds or dairy to your anacks
You need to fill up on veggies at meals. More greens and mixed veggies in stir fry of maybe make turkey chili that is full of veggies.
when I want to eat those tasty snacks, I skipped my meals, swap the calories intake on my meal to those snacks heehhee... which is nt healthy, but well.. we crave those junkfood sometimes ...