Here is a little bit on annoyance that is easy to fix. Often I work on multiple monitors connected to my laptop. I do this to give myself more real estate while I am delivering classes. Often on Fridays I just put my laptop to sleep as I make the mad dash to the airport. Once in the air (yes, above 10,000 feet) I open my laptop to start working. When I click on the icon on the task bar, I see the animation of it opening on a monitor that is not there. Here is how you fix that?
On the task bar, click the icon of the window that you want to recover.
Hold down the Window key and then press the Right Arrow key. This should move the application to the right half of your screen.
On a side note, this short cut also moves windows from the right half to the left half of the screen by using the left and right arrow keys. While the Windows Key is still pressed, press the Left Arrow. This turns the application window transparent. Pressing it again moves the application to the left side of the window. You can repeat this with the Right Arrow key.