There are many different types of ab exercises that you can do to help you get a flat stomach. Ab crunches, for example, are the most common type of ab exercise that people do on a regular basis and have been popular for several years now. Other types of ab exercises include various push-up variations, sit-ups, leg lifts, and more. The main thing to remember is that any exercise that works your abs will help you to get rid of belly fat, so long as it is done on a regular basis in order to keep your body toned.