Here are few handy Windows Key shortcut keys I find useful
|Go to desktop
|Search settings only
|Search files only
|Show the ‘charms’ menu (the one on the right)
|Switch between recently used apps and programs (left apps bar)
|Lock the screen
|Opens windows explorer
|Open the Run dialog
|Opens the Search everywhere. Also do this by pressing the Windows key and just start typing
|This opens the ‘Quick Link’ menu. Very useful for the power users out there.
|+ SHIFT + (left or right arrow)
|Move an app or window from one monitor to the other if you have multiple monitor.
For a full list of Windows 8 shortcuts see http://windows.microsoft.com/en-gb/windows-8/keyboard-shortcuts