Monochrome. Black-and-white works well with seascapes, because, except for colorful sunrise or sunsets, these scenes are monochromatic by nature: black rocks, white foam, blue sky, and aqua-green water. By converting your photographs entirely to black-and-white, you get more latitude in adjusting contrast, while retaining a natural look. Next time you're beachcombing, give Levy's techniques a shot. Or maybe two.