This is a stupid little thing that I should have figured out a long time ago, but I am VERY excited about it!
I love keyboard shortcuts. I especially love being able to do things without using the mouse. Today I discovered that in Visual Studio 2005 (this might work in other versions too, I haven’t tried it) there is a great keyboard shortcut that lets you switch between the files you have open for edit. To use it just hold down Ctrl and press Tab. It pulls up a little box in the middle of the screen that is simmilar to what you see when you use Alt+Tab, but instead of a list of open programs it has two columns, one with a list of the files you have open for edit, and one with a list of available windows such as your toolbox or the Solution Explorer.
This also works in Firefox for Windows. Enjoy!