Following the recent release of Microsoft SharePoint 2010 Administration Toolkit v2.0 every consultant and farm/pwa administrator should check out the new SharePoint Diagnostic Studio 2010 (SPDiag 3.0). A peak below of running SPDiag in the standard demo virtual machine and some of the reports you can generate. Will definitely be very useful to troubleshoot performance issues for instance in a farm.

SharePoint Diagnostic Studio 2010