Start snacking. Snacking has a bad reputation but the truth is, snacking can prevent you from overeating when you have a meal because you won't be so hungry. The key is to eat healthy snacks such as yogurt, cheese, and fruit. Snacks can give you a little boost and tide you over until you sit down for something more substantial.
If you are going to eat a salad at a restaurant and fat free or low-fat dressing is not available you should ask for the dressing on the side. That way you can dip your fork into the dressing before taking some salad and control the amount that you are consuming.