My new favorite short­cut in Win­dows 7 – If you click the Win­dows key and the Left Arrow key, your active win­dow will instantly snap to the left side of the screen. Like­wise, click­ing the Win­dows key and the right arrow key will snap the active win­dow to the right side of the screen. This really comes in handy if you use mul­ti­ple mon­i­tors. When you’ve got that under con­trol, click the win­dows key and the up arrow and voila, your active win­dow is max­i­mized. Give it a try!

Keyboard Shortcut, Windows 7