1.Imagine your in a Happy Place. - Think of a particular place, or moment that makes you truly happy. When you do, you're more likely to deliver a genuine smile and that will show in the photos. Some of the things you can imagine are the time you said "Yes" to your fiance or the first time you kissed.
2.Rely Music to stir your emotions - Play a song that in your head that makes you feel confident.
3.Find your good angle and Smile with your eyes. - As you pose for the camera, twist your hips at an angle to create curves. Like an "S" curve. This is a trick for a smile that doesn't involve flashing all your teeth. They key to this is to think of a happy thought or imagine something or someone you love in front of you and let your reaction and emotion speak through your eyes.