The Patterns & practices Guidance Explorer is a nice application helps you using best practices. The Guidance Explorer provides a database of recommendations and best practices for ASP.NET, ADO.NET, and the .NET Framework that you can easily filter and search. Particularly useful are some of the checklists you can easily follow for performance and security best practices prior to deployment.

You can create custom views of the library of just those recommendations you care about. What is cool is that you can now also easily publish these custom views to your friends or other members of your team.