This document discusses how to build rich user experiences with JavaScript without creating "spaghetti code". It advocates for pushing events rather than state between components, writing small discrete bits of code, and fully decoupling components. Specific techniques mentioned include using design patterns like mediator and observer, frameworks like Knockout and Backbone, namespacing, inheritance, and testing isolated layers. The goal is to structure JavaScript applications similarly to server-side code by treating the client-side seriously and applying best practices around modularity and loose coupling.