Black Viper series: Windows services

There are plenty of services in Windows NT (NT4, 2000, XP) based systems that you can turn off and increase your system resources. Black Viper developed some guides for service configurations (2000 and XP). He has also given safe configurations, power configurations, and default. He goes on to describe the services in case you need to know they are for.
Useful for tweaking your system to work for you.