Yesterday I found a very useful article on MSDN about Enabling Application-Level Tracing
http://msdn.microsoft.com/en-us/library/1y89ed7z(VS.85).aspx
<configuration>
<system.web>
<trace enabled="true" requestLimit="40" localOnly="false"/>
</system.web>
</configuration>
So I would to ask if there are other useful config settings that you recommend learning about?
See here and the pages it links to (and the pages those pages link to) to explore various things you can put into web.config. http://msdn.microsoft.com/en-us/library/ms228147(v=VS.85).aspx