I am sure that most people know that Windows Key + M will instantly minimize everything on your desktop. But, you have to stop what you are doing to do that. And, I can't find a good way to bring back the windows.
But, if you move your pointer ALL THE WAY to the bottom right on the small line there (even to the point you can't see it) and click, then everything will minimize. And, clicking there again will bring everything back up.
