"No matter how bad you're feeling, you perk up when you have something to strut about-and in. But, while shoes are fun, stilettos represent a challenge. You can't possibly slip on a pair of four-plus-inch stilettos for the first time and walk the walk without wobbling. Everyone starts in flats, because there's no challenge to walking around in them-nor do you enjoy the feel of red-hot femininity and admiring glances. You have to work your way up, and the same is true in business: Inch by inch, we get taller. Our confidence rises. We will undoubtedly stumble-that's called "experience"-but we...