Have a photo on your hard drive that seems to capture your wedding's heart and soul? Upload it to a palette generator, which will kick out most of the main hues involved. Unless you're on the beach, use one of the more neutral, calming colors as a primary (e.g., use it for bridesmaid dresses or table linens), and the more nervous, high-energy colors as accents (use these in table napkins, chair sashes, ribbons, and some of your flowers.)

Make a Mood Board. Once you've narrowed down some favorites, start grabbing photos (for your own personal use, of course). Make a special folder on your hard drive, and save photos that seem to fit the colors, setting and season you're going for. If you've got any photo editing software, start putting them together in one big image. This will tell you more than thousands of words how your look will play out.