"When you study the most successful mobile/web products, you start to see a pattern on how they grow. Turns out, there's not too many ways to reach 100s of millions of users or revenue. Instead, products mostly have one or two major growth channels, which they optimize into perfection. These methods are commonplace and predictable.
Here are the major channels that successful products use to drive traction – think of them as the moonshots."
infographic courtesy of referralcandy, article hat tip: andrewchen.