Besides a healthy diet (sorry... no beer! ) and building muscle, the key is LOW INTENSITY CARDIO!!! Interval workouts will NOT burn fat. They are mainy anaerobic activities, and anerobic burns only carbs. Lower intensity cardio uses mainly fat as an energy source. Also, remember to keep working on muscle mass, because the more muscle, the higher your resting metabolism will be and thus you will burn more energy(fat) all day long. Good luck!!
(I'm an exercise physiology major... If you have any other questions, let me know!)