It would be wonderful if women didn't need to own practical shoes. It's so much fun to shop for and wear Sex and the City-style stilettos and fashionable - if not functional - works of art. But there are some must-haves that you need for your shoe wardrobe. Here are 10 styles you shouldn't pass up. First, start with flats. A sassy pair of ballet flats will jazz up any jeans ensemble or add flair to a plain...