Troubleshoot tips

Here is list of tools and links I use to troubleshoot problems on IIS boxes:

Filemon.exe (sysinternals tools)
Regmon.exe (sysinternals tools)
procexp.exe (sysinternals tools)

Logparser.exe (This is a super parser for IIS logs and much more. It’s a live/time saver)
IIS Debugtools (Debug Hangs/crashes memory leaks)
AuthDiag (Authentication problems)
IIS Resource Kit tools
IISTracer (Realtime monitoring) (of course)