Dave Child from www.ilovejackdaniels.com has created a very nice set of cheat sheets on various dev topics.
By looking around I found different ones from other web site.
These are really useful as they fit in one printed page to show all the features.
I put them all together so my links covers every subject that an ASP.NET developer deals with on his day to day job :
ASP.NET AJAX Library
.NET Format String
VS 2005 Built-in Code Snippets (C#)
VS 2005 Keyboard Shortcuts (C#)
VS 2005 Keyboard Shortcuts (VB)