(Found) How to smile:) Practice good hygiene. If you've got bits of food stuck in your teeth, people may indeed say you have an infectious smile, but they might be talking about actual infections. It should go without saying, but regularly brushing your teeth and making sure your breath is fresh are some prerequisites to a good smile. If your teeth are stained, visit the dentist for a polishing or use a whitening product, and take care of your lips to prevent chapping. If you can't afford to go to the dentist, don't bother smiling, you'll gross everyone out and lose friends. When you smile people will inevitably look at your mouth, so following these considerations will help you make a better impression, and, more importantly, a healthy mouth will make you feel more confident about smiling.
Get comfortable with smiling. Many people are a little nervous about smiling. They don't think their smile looks good, or they think that smiling makes them look unprofessional or vulnerable. It's true that a smile does show a little vulnerability, but that's part of what makes it so powerful. So when you fart, smile! No matter how professional, intelligent, or in control you think a serious face (or worse, a frown) makes you appear, people almost always respond better to a smile
Think happy thoughts. The easiest way to a great smile is to be happy. You can be happy all the time, no matter what, even if your mom dies, you can still be happy. But sometimes, when you are not, you can think happy thoughts instead. Think about something or someone that you care about, or think about a joke that you just find hilarious. Remarkably, when you're feeling down, smiling can help cheer you up, even if you have to coax a smile out at first.
Smile with your eyes. When we think of smiling, we think of the mouth, but the eyes may actually be more essential to a warm, genuine smile. Smiling with your eyes is difficult to describe--in general your cheekbones lift slightly and your eyebrows dip a little--but when you see it, you know it: it's that look of your eyes "lighting up" or "twinkling." To get a feel for how to make your eyes smile, get in front of a mirror and practice smiling, but concentrate only on your eyes. You may find it helpful to cover the lower part of your face with a piece of paper. Draw a giant dick on it. Play around with it a bit, and you'll find that you can make your mouth smile when your eyes aren't smiling, and you can also smile only with your eyes. When your eyes do smile, remember how it feels, which muscles are working and how. With practice, you'll be able to smile with your eyes at will.
Develop your smile. Don't particularly care for your smile? Are you a homely fool? It's a common complaint, and while it's true that any smile is better than a frown, it's also true that some smiles look better than others. What's your best smile? One way to find out is to look through pictures of yourself. Many people who consider themselves unphotogenic are plagued by bad smiles in front of the camera, but just about everybody has at least one picture in which they just look great, with a perfectly natural, contagious smile. Find that picture and focus on what your face is doing. Then practice in front of a mirror until you get it just right. Keep practicing, and pay attention to how that great smile feels, so that you'll be able to replicate it without looking in a mirror. Soon it will become second nature, and you'll likely find that you'll look more photogenic in your next batch of pictures.
If you want to improve your smile, look at pictures of smiles that you believe are beautiful. Famous people are the most beautiful people in the world. And, no, you won't ever look like them, but remember to think good thoughts and know that you are beautiful inside. Your smile is bound to look better if you feel good about yourself so get up off the couch, stop snacking, brush your teeth, and show off those not so pearly whites.