The Patterns & Practices team has just released an excellent set of prescriptive guides for Visual Studio Team System.
Read the detailed information in J.D. Meier's announcement post, but here are the direct links:
Explained: Branching in Team Foundation Server Explained - Structuring Your Solutions and Projects in Source Control with Team Foundation Server How To: Perform a Baseless Merge in Team Foundation Server How To: Step Through Creating a Custom Check-in Policy for Team Foundation Server 2005 How To: Step Through Creating Your Source Tree in Team Foundation Server 2005 How To: Structure Your ASP.NET Applications for Team Foundation Server How To: Structure Your Source Control Folders in Team Foundation Server How To: Structure Your Windows Applications for Team Foundation Server Source Control Practices at a Glance (updated) Source Control Questions and Answers (updated) Video: How To - Migrate from VSS to Team Foundation Source Control Video: How To - Setup Your Source Tree in Team Foundation Server Video: How To - Structure Your ASP.NET Projects for TFS
As J.D. mentions, keep an eye on the Visual Studio Team System Guidance Project on CodePlex as more guides, recommendations, and instructional resources are released!