TFS Guide from Microsoft on CodePlex

I think http://www.codeplex.com/TFSGuide is helpful as it provides very useful training/mentoring/resource information on Microsoft Team Foundation Server.

Part I, Fundamentals
* Chapter 1 - Introducing the Team Environment
* Chapter 2 - Team Foundation Server Architecture
Part II, Source Control
* Chapter 3 - Structuring Projects and Solutions in Source Control
* Chapter 4 - Structuring Projects and Solutions in Team Foundation Source Control
* Chapter 5 - Defining Your Branching and Merging Strategy
* Chapter 6 - Managing Source Control Dependencies in Visual Studio Team System
Part III, Builds
* Chapter 7 - Team Build Explained
* Chapter 8 - Setting Up Continuous Integration with Team Build
* Chapter 9 - Setting Up Scheduled Builds with Team Build
Part IV, Large Project Considerations
* Chapter 10 - Large Project Considerations
Part V, Project Management
* Chapter 11 - Project Management Explained
* Chapter 12 - Work Items Explained
Part VI, Process Templates
* Chapter 13 - Process Templates Explained
* Chapter 14 - MSF for Agile Software Development Projects
Part VII, Reporting
* Chapter 15 - Reporting Explained
Part VIII, Setting Up and Maintaining the Team Environment
* Chapter 16 - Team Foundation Server Deployment
* Chapter 17 - Providing Internet Access to Team Foundation Server
Part IX, Visual Studio Team System 2008 Team Foundation Server
* Chapter 18 - What's New in Visual Studio Team System 2008 Team Foundation Server