Are you using the Windows Key in your keyboard? It comes very handy on occasions. Followings are some few useful short cuts that can be used with Windows key.
W = Windows Key
W: Opens Start Menu
W+ E: Opens up Windows Explorer
W+ R: Opens the Run command.
W+ U: Opens Utility Manager
W+ L: Log Off
W+ F: Search files on your computer
W+ D: Show Desktop [will switch back and forth from all minimized and back again]
W+ F1: Help Menu
W+ Pause/Break: System Properties
W + Ctrl + Tab: Cycles through Tabs in your current app [eg. Firefox’s last focused tabs]
W+ Tab: Cycles Through Buttons in Taskbar
W+ M: Minimize all open windows.
W+ Shift+M: Maximize the windows you had open before minimizing
W+B: Set focus to the first System Tray Icon [which is the arrow if you enable the Hide Inactive Icons option]
CTRL+W +F: Search for computers