Foods can be addictive, or just strike up cravings that we feel we must indulge on. Practice saying "NO!" and prove to yourself you don't need extra portions or unhealthy foods!
You can do this! Sometimes food cravings are unbearable. I am telling myself NO! because I am ready to be healthy and win. Remember, no matter how many times you fall down, you don't have to give up! Over a period of time you WILL look back and see how far you have come!