How to move an off-screen window back on-screen

With anybody who hooks up external monitors or uses multi-monitor displays, I'm sure you have encountered the situation when the window / program you are trying to access is outside of the visual display area. I've figured out a way over the years to quickly bring the window back in the display area. Here is how you do it:

1. Right-click on the window you are trying to access and click "Move"
2. Hit any one of the arrow keys on the keyboard. (This will lock the window to your mouse cursor)
3. Move your mouse around to bring it back within the display area.

I'm not sure why hitting an arrow key on the keyboard has this effect, but it does work and is alot faster than resizing your desktop or restarting your computer.