I stopped buying most everything. I don't buy pop, chips, candy, etc. THe only things in my house that don't require cooking time are pretzels, almonds, popcorn and tortilla chips (for nachoes, need those).
Not that thats helped me lose weight... I'm the type that doesn't lose weight no matter what. Even after I moved out oy my parent's house and stopped buying all that stuff (I drink maybe 2-3 cans of coke a month, and maybe a have 1 bag of chips every 5-6 weeks), I haven't lost weight, and this is years later. Exercising gives me more enegry, but no weight loss or size change So... right now, I just do an hour or two a week on the treadmill and yoga once a week just to stay where I am. Because I know I probably will never lose the weight.