On the cloud, we are in a different world now where it is a lot easier to evolve architectures as you go along. Typically, running lean architectures are not only easy to evolve and operate but also helps you optimize your costs. We will explore some techniques and best practices to lower your AWS bills in the following sections. Interestingly, note that a simple do-nothing strategy would have also led to savings because over a period of time, Amazon has been able to leverage economies of scale and pass on additional savings to their customers. In fact, they have reduced prices over 60 times since 2006, and their prices continue to be revised downwards for various services on an on-going basis.