Hagrin.com

I don't usually post links to mirrors, but since the main site is down Ethical Hacker has mirrored an article called the Anatomy of a Hack (Chapter 2), that's a terrific resource in penetration testing. The article looks at a Windows network and provides a step-by-step plan for planning out your own test. All network security enthusiasts should read this article if they don't know the steps and also those who do as a refresher course.