I was doing some troubleshooting recently and apart from looking @ DebugDiag, came across the below post from Steve.
http://blogs.orcsweb.com/steve/archive/2006/07/08/Troubleshooting-process.aspx
The blog lists some of the "Usual Suspects" when trying to trace down a unexpected crash/hang symptom
Here is one more link
HTH.
Thanks,
Deepak