We are surrounded by food 24/7. A means to fight these urges for a piece of candy, or a pack of chips is head over to the sink and brush your teeth.
Brushing your teeth helps to keep your mouth refreshed, while killing the urge to eat anything unless you really enjoy the taste of toothpaste (if you have been eating toothpaste since you were a child, you have bigger issues than trying to lose weight).
Brushing your teeth will also remind that you are taking care of your hygiene to look good and to lose weight.