Stomach weight loss is a challenge for most people because your stomach is designed to store fat well. It is one area, too, that is not very receptive to toning. You could have fat arms and legs, but if you just start toning them, they will firm right up. Not so with the stomach. You must do cardio and lots of it. Toning alone will, indeed, give you great abs but no one will be able to see them without cardio because the fat will remain and hide your muscles.
The first place to begin and the most constant thing to maintain is your cardio exercise. Without cardio, your stomach will remain completely unchanged. Running, dancing, and biking are great ways to do this. Remember that it is the intensity of the cardio work out, not the length. Make sure you sweat and get your heart pumping. Let yourself be out of breath.