Microsoft links I have yet to read, but really should...

How Do I: Create a Breakpoint
Using Conditions?
How Do I: Create a Breakpoint Using Hit Count?
How Do I; Learn Tips and Tricks for Debugging in Visual Studio?
Office Development with Visual Studio Developer
Center Just Launched!
Microsoft Cloud Computing Tools
How Do I: Add Tool Windows to the Visual Studio IDE?
How Do I: Add a New Tool Window to Visual Studio?
How Do I: Integrate With the Error List?
How Do I: Create a Basic Language Service Using the Managed Babel System?
How Do I: Create Custom
Project Templates Using Visual Studio 2008?
How Do I: Create an Item Template Using Visual Studio 2008?
How Do I: Write to the Output Window?
Explore the New Features of Visual Studio 2008
How Do I: Create a Debugger Visualizer?
How Do I: Place My Commands Into Different Kinds of Visual Studio Menus?
How Do I: Add Commands
and Controls Into the Visual Studio IDE?
How Do I: Get Started with the VisualStudio Domain Specific Languages?
Heroes Happen Here
DotNetNuke® and Visual Studio 2008
Visual Studio Tip of the Day
How Do I: Add AJAX Functionality to an Existing ASP.NET Page?
How Do I: Debug a Windows Presentation Foundation Application in Visual Studio 2008?
How Do I: Use the LINQ-Enabled
XML API in Visual Studio 2008?

How Do I: Create and Use an AJAX-Enabled Web Service in a Web Site in Visual Studio
2008?

How Do I: Create and Consume a Windows Communication Foundation Service?

How Do I: Learn About the Integrated Development Environment in Visual Studio 2008?

Building ASP.NET bot protection (CAPTCHA-like)

Efficient Server Side Paging with the ASP.NET GridView Control

SQL Cache Dependency with SQL Server, LINQ and ASP.NET 3.5

Extending ASP.NET MVC Html Helper Class

N-Layered Web Applications with ASP.NET 3.5 Part 4: Sorting, Paging and Filtering

Communication from User control to Page in ASP.NET

http://msdn.microsoft.com/en-us/library/ms752347.aspx