one word: cardio
You need to get the heart rate up for an extended time. Do tread mill, joging, swimming, bike, both stationary and regular bikes work fine. Keep doing this and eat right. If you don't have a very high metabolism, then you need to be eating a lot less than normal, but don't start starving yourself. What would you say you eat in a day, or have many calories {not carbs you atkins freaks!} do you eat in a day?