There's more to smiling than simply trying to be nice and polite. Studies show that smiling can actually make you happier, even when you're faking it! In other words, from a young age, we've smiled countless times while in the presence of others or when experiencing something, be it a first kiss or heartfelt moment in a movie. Unbeknownst to us, that very smile was putting us in a better mood, making us even more likely to enjoy that special kiss or captivating movie scene. Now, does this mean that smiling around your obnoxious boss or meddling in-laws can make you like them more? That's probably a stretch. I think smiling can best be put to use in certain situations. For example, when you're nervous about something -- say, a presentation you have to make before a crowd of 100 people -- smiling can likely calm your nerves and put you in a more positive frame of mind: Instead of thinking "I'm going to do terribly," you may feel you can actually wow ...