cbsnews.com — Nowhere are lists bigger these days than at the newsstand. There's 998 fitness and beauty tricks, 7 hot businesses that can make you rich, 4 guys every girl should date, 3 fundamentals for prevailing in a gunfight. And then there's Men's Health, with at least a 12 lists and some 2,000 tips every issue. And the number one reason why? Lists sell.