Working on Willpower

I have a weakness for food. I love food; fruits, veggies, sweets, salty, you name it, I like it. I sabotage my own efforts, because I have no willpower to abstain. For the most part I have dealt with this by not having certain in foods in my house. We don't stock chips , cookies or ice cream; if i want it, I have to go get it. But then the problem comes in with my husband. He tends to buy things in quantity, like chocolate. So my new goal is to stop making excuses and stick to my guns and develop the willpower to say no. After all, do I want the chocolate, or do I want to get rid of these last 15 baby pounds? I know its going to be hard, but I know I only have myself to blame for both my successes and failures I cannot blame anyone else. What is your weakness? How have you learned to cope with it?