Studies show that too many compliments can go to your head -- and fast. I can vouch for the veracity of these studies, as I've experienced this firsthand and have seen a few friends change dramatically as a result of too many compliments. Let's face it: When people compliment us, it feels really good. Whether they're commending us on something we put together at work or complimenting us on our getup, compliments feed our egos and make us feel like a million bucks. They lead to increased feelings of self-worth and self-esteem. They validate something about us that we've likely put considerable effort into improving. People thrive on positive feedback from others; it gives us the impetus to continue striving for improvement. When I lost roughly 25 pounds in 2013, I started getting more looks from women at the gym and at work. It felt great considering the hours I was putting in at the gym and the willpower it took to cut back on my favorite goods. It's never fun...