The document discusses two approaches for companies to enter new markets: the waterfall approach and the sprinkler approach. The waterfall approach involves carefully planning an expansion into fewer markets to avoid overstretching resources, while the sprinkler approach is used when first-mover advantage is important in highly competitive markets. Developing markets like those in BRIC nations and Southeast Asia represent large potential markets as their populations account for 20% of the world's people and their incomes are rising. The document also provides examples of companies that earn significant portions of their revenues from emerging markets and strategies for identifying attractive new markets.