If you are working with Wepsphere Application Server this is an excellent reference
The document contains sections on, Administration, Application Development, Architecture, Installation, Migration, Performance, Problem Determination Tools, and Security. Each section contains links to Learning documents, technotes, and troubleshooting references.
I found this via the IBM_appserver twitter account, a good one to follow if you are working with WAS.
Looking for the troubleshooting Guide for WebSphere Application Server ibm.co/gkO0CY #wasserv
— AppServer Support (@IBM_AppServer) March 19, 2012
