Rails 2.3.3 brings us a new feature called "touch". See how to use this to auto-expire associated caches in this episode.

Is there a long running task which should be handled in the background? One of the best ways is using the delayed_job plugin like I show in this episode.

Learn how to apply OpenID to an existing Authlogic setup as I show in this episode. This builds upon the app from episode 160.

Use JavaScript to allow dynamic content in a page cache. In this episode I show you how to insert the user-specific content into a page through JavaScript.

Learn two different techniques for parsing an RSS feed using Feedzirra in this episode!

Use a virtual attribute to implement a simple tagging feature. In this episode I show you how to assign virtual attributes through a callback instead of a setter method

Metric Fu is a compilation of several tools to help find areas of code that could be improved. In this episode I show you how to setup this tool on the railscasts.com source code

Use checkboxes to select multiple records and edit them all in one form as shown in this episode. With virtual attributes you can even edit values relatively!

Cron is great for handling recurring tasks, but it is an external dependency with a crazy syntax. In this episode I show you how to use Whenever to create cron jobs with Ruby

Creating a social networking site often requires a self-referential association on the User model to define friends/followers. In this episode I show how to do exactly that

The acts_as_tree plugin provides many methods for handling a tree based association. In this episode I show how to build a navigation system with tabs, subpages, and breadcrumbs.

Ever want to know what Rails is doing under the hood during a request? In this episode I show three different profiling tools: New Relic RPM, FiveRuns TuneUp, and Rack::Bug.