Windows 7 Window Size/Position Keyboard Shortcuts
In Windows 7, you can use the WINDOWS-KEY + UP/DOWN/LEFT/RIGHT to manipulate the position and size of the focused window.
WIN+LEFT: Snap to left half of screen + resize. WIN+RIGHT: Snap to right half of screen + resize. WIN+UP: Maximize WIN+DOWN: Minimize
Pressing WIN+LEFT/RIGHT multiple times will cycle the window between the primary anchor side (direction of arrow) then the opposite side then back to it's original position and size.
Enjoy!