I searched, but i'll admit, only for about 5 minutes. So if this has been answered, try to only stab me once or twice.
I just recently started using dual monitors, and it's badass. I wonder, though: is it possible to have a game open full screen on one monitor and be browsing/chatting on the other? Currently if I mouse over to the secondary monitor and click on something, it minimizes my game. Which makes sense, but I think it'd also make sense for someone more clever than I to figure out a way around this.
many games can do a "fake" fullscreen mode where it is technically open in a window, but is borderless, and you can mouse out of it.
Look through the settings for that, and you will be golden.
Let's play Mario Kart or something...
Other than that it works great and you'll wonder how you ever survived without it in the past.