coordinating colors

I am always amazed by the cool color combinations found in magazines, websites, homegoods, stationery etc. Just how do designers come up with such lovely combos, especially the splash of the unexpected that highlights things just brilliantly?
One tool is the Kuler Adobe website.

This combination is called "A Lullaby". I love it. You can spend loads of time clicking around on the Kuler site to see what people have submitted or even submit your own palette.
Another great feature is that you can search by color. Orange + Grey resulted in the above mix. Love it.