Today's 18-to-40-year-olds make for a notoriously elusive group of consumers: they're savvy, sophisticated, and particular. They're all but immune to traditional advertising and have an instinctive sense of quality and fair pricing. Inundated with choices, they are drawn to brands that satisfy not just what they need, but what they crave. At the same time, these consumers are spending money like it's going out of style. Generation X has firmly refuted its slacker reputation and is nearing the height of its earning potential. Generation Y has more buying power than any previous generation of...