Since I started at my new job I have been doing a lot of web development and I have found one tool to be absolutely amazing. The fiddler tool! It is a HTTP debugging proxy that let you analyze traffic from your webbrowser. For instance you can monitor an applications calls to a web service so you can inspect the SOAP envelopes actually being sent.
Lately it has been very handy when debugging a component that was running in the flash player.
If you are a web developer I recommend you have a look at it.
Fiddler Web Debugger – A free web debugging tool
Introducing FiddlerWhat is Fiddler?Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and “fiddle” with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language.Fiddler is freeware and can debug traffic from virtually any application, including Internet Explorer, Mozilla Firefox, Opera, and thousands more.