A few core concepts could probably use a little more clarity;<p>- Real "Virality" is very different from "Word of Mouth", and implies that users bring others users to the product <i>in the process of using it</i>, to some greater or lesser degree. Photosharing apps are a good example. Uber to a lesser extent - I first learned about the service when my friend ordered a black car. Zynga's games were notorious for trying to manufacture virality by rewarding facebook friend-invites with more coins/gold/whatever.<p>- Inbound and outbound sales are very different beasts. The former is <i>the result</i> of SEO, PR, word-of-mouth, content marketing etc. Trying to "scale inbound sales" won't get you far. If you have a working outbound sales process, on the other hand, you can often ramp it up several-fold.<p>- "Channel partnerships" can be extremely useful, especially when selling to SMBs. A recommendation for some accounting software from your bank manager is very persuasive.