The key to weight management in just about any instance is diet. Specifically, you want to avoid foods with a high glycemic index because they spike your blood sugar, causing your liver and pancreas to immediately convert it to fat, at which point you gain weight and feel hungry again much sooner than you otherwise would.
Ditch soda and sugary drinks (including lots of fruit juice), use healthy oils, fiber and lots of protein to lower the glycemic index of the carbs you do eat, switch all high glycemic index carbs for lower glycemic index carbs (e.g. white rice for brown rice, white bread for wheat bread, toast for oatmeal, etc.) Lastly, make sure you're getting servings of fruit and organic vegetables which will help curb appetite.
You'll be shocked at how much weight you can shed just by steering your diet away from high glycemic index carbs and, the best part, you don't have to feel hungry because the lower glycemic carbs and healthy fats provide energy to the body over a much longer period while the fiber makes you feel full.
Also, many people don't know this but intense exercise in short intervals will radically change how your body processes carbs and fat. For example, 6 minutes of anaerobic exercise 3 days per week can provide you with many of the benefits of a full workout schedule--using fats and carbs for energy rather than storing that energy as fat.
As always, drink lots of water.
