In this presentation, Tim Branyen discusses the advantages and disadvantages to using client side templates, single page apps/sites, and how to improve your site/app performance by properly caching partial templates and utilizing fallbacks to serve a broad scope of devices and situations. The concept of progressive enhancement will be explored with some of the many new features of HTML5 to provide the ultimate experience for the user and the most minimal resources impact for the server. The majority of the talk will focus on what can be done to effectively start a new site, but will also cover concepts that are applicable to existing static and dynamic sites.