A coworker showed me a useful (and free!) tool that conveniently positions open windows on your screen.
The tool is Winsplit Revolution, and it let you use hotkeys to instantly move your windows, such as flipping a window between different monitors, or having two windows split on the same monitor. It also provides hotkeys for many other features, including maximizing and minimizing (you can use default OS keys, but I find the winsplit ones more convenient).
As a free tool that just works, I'm glad to have it.