Move Windows around in the Background by holding down Command key
If you’re like me you tend to have 10,000 windows open at once on your Mac while you work and multitask, thanks to Expose this is not a particular problem in Mac OS X. But, there comes a time when you don’t want to use Expose to either clear the screen or select a specific window, you just want to move some of the background clutter around, to access the Desktop or something of that sort. Easily done! Hold the Command key and select a Window titlebar in the background to move it around elsewhere and clear up space, now you can access that JPG on your desktop easily without having to hide all windows!