Whether you're nervous about a presentation you're slated to make before investors, worried about lab results following a doctor's visit, or freaking out about a blind date you have coming up, does it benefit you in any way to think the very worst? Absolutely not! As soon as a situation presents itself that forces us out of our comfort zone, for many of us a sense of pessimism kicks in immediately. We assume we're going to bomb the presentation. We convince ourselves the lab results will reveal something serious. We anticipate the date will be a total disaster. Seeing the glass as half empty erodes our confidence and can even do a number on our self-esteem. It's normal to feel a little anxiety in such situations, but getting extremely worked up won't help matters at all. Instead, we need to force ourselves to consider alternative -- and decidedly positive -- scenarios. Who says things can't things go smoothly? Chances are you've been in...