In at least Photoshop, Illustrator and InDesign CS5 (maybe other programs/versions too), if you go to Window > Extensions > Kuler, you get a palette with preset color palettes that compliment each other, as well as a tool to help you make new ones. Then you can save it to the Kuler list, or to your Swatches palette.
Mother pus bucket. This is fantastic.
Kory!! Kory are you seeing this!? Did you know about this? Korrrryyyy!?
Woah. That’s going to come in handy.