One of the easiest ways to pick colors that will "go together", is to pick one multicolored fabric that you love, then carry that around the store with you & pick out the colors from it. That would be your "focus" fabric - and you know you like the colors in that one already, so the others will be happy together as well! And you don't even have to use the original fabric in the quilt if you don't want to. It's quilt magic! :D