Significantly limit your intake of sugary (soft drinks, bakery items, candy) and simple carbohydrate (white bread, rice, potatoes, pasta) food and drinks.
 

Strategically pair foods: such as a lean protein with a low-fat food, or a whole grain/complex carbohydrate with either a protein or a healthy fat. This slows digestion and decreases blood sugar spikes. (Examples: turkey with low-fat Swiss cheese, strawberries with almonds, whole grain Italian bread with olive oil.)
 

Eat a healthy mid-morning and mid-afternoon snack. This will keep your blood sugar from dropping too low in between meals and it will also decrease your hunger-factor for the upcoming mealtime.