- Performance Monitoring for Windows Server 2003 and 2000 : http://www.computerperformance.co.uk/HealthCheck/Server_Health_Check.htm
Simple guide to performance monitoring under windows
- Windows 2000 Performance Guide : http://safari.oreilly.com/1565924665
Refers to Windows 2000 but has in-depth discussion of performance principles and the detail of how Windows performance can be analyzed, most of which is still relevant to current versions of Windows.
- Windows 2000 Performance Tuning : http://technet.microsoft.com/en-us/library/Bb742460.asp
TechNet article describing performance monitoring and optimization techniques, again focused on Windows 2000 but still generally applicable.
- Windows Server 2003 Performance Counters Reference : http://technet2.microsoft.com/windowsserver/en/library/3fb01419-b1ab-4f52-a9f8-09d5ebeb9ef21033.mspx?mfr=true
Comprehensive, albeit a little hard to navigate, listing of key performance counters and what they mean.