Fueling the body is a matter of timing. The longer you wait between meals, the more you tend to eat at the next meal. Three to four hours between meals is about the right amount of time to keep blood sugar levels in control.
Plan snacks with small portions in mind. Crackers and low fat cheese, yogurt and fruit, cereal and milk or peanut butter and apple slices are good options. Eating snacks with both carbohydrate and protein helps the body stay fueled.
If weight loss is your goal, space meals and snacks three to four hours apart, no matter what time of day, and watch portion sizes.