Guidance Explorer is a tool to find and use relevant patterns & practices guidance. Guidance Explorer installs with a guidance library including performance and security topics for .NET and ASP.NET applications. The guidance library contains checklists and guidelines covering design, implementation and deployment topics. The tool and the library will evolve over time to include additional types of guidance.
http://www.gotdotnet.com/codegallery/codegallery.aspx?id=bb9aecfe-56ba-4ca9-8127-44e551b90962
Really useful addition to your toolbelt.