Jim Collins wrote a great little book called Turning the Flywheel to further develop an idea introduced in his book Good to Great to describe how various parts of a business model can be mutually reinforcing. Most businesses from start-ups to major corporations have built or attempted to kick start their own flywheels. These flywheels operate for their business overall or individual products, to propel growth, cross-sell or otherwise amplify the economies of scale of their operations. Let...