When working with UserControls in VS, you can easily get yourself is a "crash loop."  The problem is that while debugging, your UserControl takes down VS.  When you re-open the solution, your buggy code runs again and again crashes the process.  It's difficult to fix the problem when VS keeps crashing, isn't it?

The fix is simple: go out to the file system and delete the .suo file.  Next time the solution is brought up, no solution documents will be displayed by default.  You can now fix the problem, but be careful not to use the designer until the underlying problem is fixed.  Using the designer before the code is fixed could expose you do another crash loop.

I plan to post more about this in the future (and hopefully some examples.)  For now, here are some resources:

• .NET must have: Start with this C# example.  Alternatively, use this VB.NET example.
  
• C#
  • Article: Using the WB with .NET
  • Article: Another WB Example
  • Article: Implementing IDocHostUIHandler
  • Article: Programmatically change printer settings
  • Article: Handle script/DOM events in .NET code
  • Example: Hosting MSHTML
  • Group: Fix problem where WindowClosing event does not fire
    
• C++
  • Article: Invoking hidden WB commands
  • Article: Implementing IDocHostUIHandler
  • Article: Updating back/forward buttons
  • Article: Use OLECMDID_ONUNLOAD to fire BeforeUnload before closing a form
  • Article: Travel Log Example
  • Article: Get an IWebBrowser2 interface from a document reference
  • Article: How to handle script errors as a WebBrowser control host
  • Group: Extend the DOM with IDispatchEx
  • BUG: IDocHostUIHandler2 Is Not Called from Within a WebBrowser Control
    
• Other
  • Helpful Delphi WB docs
  • Changing font size
  • Customizing print and print preview
    
• Documentation 
  • Programming and reusing the browser
  • VB WB Reference
  • MSHTML Reference

I'm a little late in finding this, but Infragistics is offering several VS2005 Win and WebForm controls for free:
http://www.infragistics.com/resource/Marketing/Promo/VSIP/VS2005offer/

If you're into freeware like I am, you'll love this list:
http://www.techsupportalert.com/best_46_free_utilities.htm

This is a VS macro that will take a private member declaration and turn it into a public property. It takes into account leading underscores as well as "new" keywords.