If you are using Windows 7, give this a try.
When you have multiple windows all visible on your desktop, just click on the title bar of one of the windows. While holding your mouse button down “Shake” that window my moving your mouse back and forth quickly.
All other windows on the desktop will be minimized, leaving the window that you were shaking as the only window left on the desktop.
Just a cool new feature in Windows 7. Give it a try.