A few months ago, several members of our team and I attended Drupalcon Denver and among the many things I learned, most of what had the most immediate, practical applicability came from the presentation "Front end performance improvements", which was given by Matt Farina and you can find here. One of the most valuable insights from this presentation was that up to 80% of page rendering time is spent delivering front-end resources (scripts, stylesheets, images, etc) and thus if you are serious about the performance of your sites, you need to be serious about front-end performance. So in the months since this presentation, I have made concerted efforts to get serious about front-end performance and I will now share with you several techniques and tools I have added to my repertoire in the process.