"Black Friday is our Super Bowl, and we plan to win." So said Wal-Mart's (NYSE:WMT) chief marketing officer Duncan MacNaughton. And exactly how does Wal-Mart plan to crush the competition this Black Friday?: By rewriting the old rules on everything from its door-buster deals to its price-matching policies. With Wal-Mart changing the rules of Black Friday, shoppers need to use new strategies to score the best deals, too. Here Alison Southwick and Dayana Yochim show you how to shop like a champ this Black Friday at Wal-Mart.