When Windows 7 was in beta development I was following and trying to learn every tip that I possibly could learn; however, there was one tip that I completely forgot about (and I bet you may have to).
If you have Windows 7 as your operating system on your computer, look at the taskbar (typically at the bottom of your screen) and on the far right side you will see a shaded rectangular block. That rectangular block is actually a button, called the Show Desktop button or what I call the Boss Button.
What purpose does the Show Desktop button (or Boss Button) serve?
If you have a multitude of Windows open and you want to quickly minimize all of those windows to get to and see the desktop, simply click on the Show Desktop button. If you desire to return to where you were working and open the windows back up, simply click the Show Desktop button again.
Why do I call it the Boss button?
An example: If you are at work and playing solitaire (or whatever other thing you are not suppose to be doing on the computer) and the Boss is coming toward your office, simply click the Show Desktop button (or Boss button) and whatever you have on your screen will instantly disappear and minimize to the taskbar. When the boss leaves, click the Boss button again and continue playing solitaire.