Ever wonder how large companies like Apple and Netflix write applications that always just seem to work? Wonder, how we too, can write applications that can easily adapt to changing business requirements, ease the development process, and support large customer bases without a large support department? During this talk we will explore some industry best practices, hear about things that have actually worked in production, and look at examples of bad code and how to turn it into good code, so that you have a basis to work from.