I eat 3 times a day, and am trying not to eat between meals per Dr Fuhrman's diet.
For breakfast I always have some protein: 2 scrambled eggs with spinach, onions, or tomatoes and onions; or either yogurt or oatmeal with walnuts and blueberries, or a green smoothie with fruit and spinach. Any of those will keep me satisfied for 4 to 5 hours.
Also it's really important not to eat starch in the morning, because it pushes up blood sugar and drops it fast, making you hungry. So if you eat eggs, you won't be hungry for hours, but if you add toast, you will be hungry again sooner. At least so I believe.