Do you usually work with strongly type datasets or create strong names maybe? Then you spend sometime working on Visual Studio Command Prompt. You can access this under Visual Studio Tools obviously. I have spent some time myself working on the Visual Studio Command Prompt myself. Few weeks ago I started using VS Command Shell from CodePlex (currently in version 1.2).
It is really a time saver its like having Visual Studio Command Prompt right inside Visual Studio IDE. Installation can be downloaded at Codeflex and you can find more information here.
Here is a screen shoot which even have the directory defaulted to my currently selected projects folder:
Enjoy 