If you're like most professionals, you've probably spent countless hours researching the secret to success and trying to mimic the ways of your biggest role models. You may have even forked over some hard-earned cash on seminars and programs that promise to help you achieve your wildest dreams. However, the outcome always seems to be the same: you feeling defeated and like a failure time and time again. Although I'd argue there's not one isolated key to success but rather many, there is one trait that stands out from the rest. Read on to find out what it is and how to hone it.