Here's some less common but still very useful keyboarding shortcuts.
Function keys: Press one of these keys at the top of your keyboard to quickly perform an action
F1: Open the Help page or window
F2: Rename an object (e.g., file in Windows Explorer)
F4: Shows the address bar in Windows Explorer
F5: Refreshes the page
F6: Moves to a different panel or screen element in a window or the desktop
Take a screenshot: Useful for pasting an image of your desktop or a certain program and sending to tech support
ALT+Print Screen: Capture a screenshot of a window
CTRL+Print Screen: Capture the entire screen/desktop
Windows 7 User? Checking out the Snipping Tool for nifty screen shots too.