I’m working on hardening a sharepoint environment. Here is a good reference.
Hardening a system.
http://technet.microsoft.com/en-us/library/cc262834.aspx
Debugging errors under the covers. (This was handy)
http://www.sharepointblogs.com/michael/archive/2007/06/28/sharepoint-under-the-hood-see-real-error-description-and-callstack-stack-trace.aspx
Happy Sharepoint!