Fiddler is bigger and better than I thought
Become a Web Debugging Virtuoso with Fiddler
Eric Lawrence in 408B on Tuesday at 1:30 PM
Learn how teams around Microsoft and ISVs around the world use the Fiddler web debugging tool to find bugs, troubleshoot performance problems, and uncover security vulnerabilities in both client and server code. Explore the best add-ons for Fiddler, and build your own functionality using JavaScript and .NET languages. Examine how new features in Internet Explorer 8, like Accelerators and Visual Search suggestions, utilize the network. Learn actionable best practices for building faster websites.
I use Fiddler all the time. Maybe not daily, but at least several times a week. It seems, like most software, I only use about 10% of the features (probably much less) of the application. After watching this video I vow to start using it better and more often.
Watch the video. It is worth your time.