there are several things to keep in mind:
1) the higher your blood sugar, the hungrier you are; (because your muscles aren't getting any food, they cry).
2) if it's in the house, you'll eat/drink it; (so DON'T buy it~!).
3) when you get dehydrated, you crave juices; (drink water, keep it by you bed, your computer, everywhere you sit down, and try to keep it cold).