Do facial exercises like smiling, jaw opener,fish lip among other exercises. These exercises help in strengthening your jaws. Drink a lot of water.When you don't drink water the extra little water is preserved in the cheeks making your face look puffy. Avoid drinking alcohol because they'll end up adding calories to your body. Finally, take a lot of fruits and vegetables, they'll make you look very healthy because of the vitamins they provide your body with.