Working Backwards by @Werner Get clarity on what you're going to build by creating the documents you'll need when you launch: In the fine grained services approach that we use at Amazon, services do not only represent a software structure but also the organizational structure. The services have a strong ownership model, which combined with the small team size is intended to make it very easy to innovate. In some sense you can see these services as small startups within the walls of a bigger company. Each of these services require a strong focus on who their customers are, regardless whether they are externally or internally.
