= Windows key on the keyboard
+ right or left arrow will snap a window to half of the screen. This is the same as dragging a window to far left or right side of the screen.
+ up arrow will maximize a window to fill the screen. This is the same as dragging a window to the top of the screen.
+ down arrow on a maximized window will restore it to the original size.
+ down arrow will minimize any regular window to the task bar.
+ M will minimize all windows to the task bar.
+ D will show the desktop (effectively minimizing all windows). Use the same keyboard shortcut to see your previously opened windows.
+ home will minimize all open windows in the background except the top most active window.
+ T will iterate through your task bar thumbnails of open applications.
If you have multiple monitors, + shift + right arrow will move the active window to your next monitor. + shift + left arrow will revert it back.