If you are using Visual Studio 2005, you sure have encountered a new nifty feature called Code Snippets.
There are a lot of articles and blog posts surrounding this topic, so why another post? Well I'll try to give give you a (hopefully) complete roundup on

-what Code Snippets are
-how you can use them
-how to create your own
-where to find some already done by others
and how to install and manage them

http://jens-schaller.de/nc/blog/blogsingle/archive/2006/february/article/code-snippets-the-whole-enchilada/index.htm

Jeff Atwood - Code Snippets in VS.NET 2005 (www.codinghorror.com/blog/archives/000419.html)
MSDN - Creating and Using IntelliSense Code Snippets (msdn2.microsoft.com/en-us/library/ms165392.aspx)
MSDN - Code Snippets Schema Reference (msdn2.microsoft.com/en-us/library/ms171418(en-us,vs.80).aspx)
Visual Studio Hacks - Snippy (visualstudiohacks.com/snippy)
Roland Weigelt - Code Snippets (weblogs.asp.net/rweigelt/category/10077.aspx)
GotCodeSnippets.NET (www.gotcodesnippets.com/default.aspx)
MSDN - Visual Studio 2005 Code Snippets (msdn.microsoft.com/vstudio/downloads/codesnippets/default.aspx)
Jeff Atwood - C# Snippet Parity (www.codinghorror.com/blog/archives/000522.html)
Jeff Atwood - Download C# snippets and registry file (www.codinghorror.com/blog/files/ms-csharp-snippets.7z.zip)
Jett Atwood - Snippet Enumeration Macro(www.codinghorror.com/blog/archives/000526.html)

personal adds
http://www.codekeep.net/
http://www.codekeep.net/addins.aspx (yes, with vs2005 version also!!!)

Visual Studio 2005 Unit Testing Code Snippets
http://exceptionz.blogspot.com/2006/02/visual-studio-2005-unit-testing-code.html