Having worked on several large-scale JavaScript applications built with Backbone we have seen many of the problems new teams experience with the library. In our projects we have hit on lots of issues, done a lot of strange things and learned a great deal. In this presentation we try to distill our experiences down to a few simple points that are important to consider when working with larger JavaScript applications based on Backbone. We have found several patterns that have increased the structure, maintainability, reusability and testability of our applications. In this talk we will present the most important of these and show you how to incorporate them into your own code. The primary focus in the presentation is applications built with Backbone, but several of the issues we raise are equally important in all large-scale JavaScript application. Among other things we will talk about reuse, plugins, memory management, how to use models and views, and lots more.