If you're looking to lose stomach fat, check out the link above for more information. Fat around the stomach area can be tough to get rid of, as it is often the last area of your body to burn fat. Many people forget that when you're losing weight, you actually burn fat across your entire body – your neck, arms, and legs included. Generally these areas thin out, leaving areas such as the midsection and thighs (in women, especially) last.
The key to losing weight is a two-fold approach of exercise and diet. While this should be no surprise, there are certainly ways of optimizing both. At the end of the day, weight loss is about creating a caloric deficit, but there are certain diets that make the process more livable (certain types of foods that keep you satiated more than others), and there are different exercise methodologies which seek to create metabolism boosts, and so on.
