Filling the frame with your subject is a great way to grab your viewer’s attention. Try coming in closer by using the zoom or actually stepping closer to your subject. In this case I stood in the water and kept the camera low as the swells of the waves approached - then quickly got the camera up and out of the way! This was taken with my point and shoot, but for a more expensive camera, I would rent a waterproof housing and really get into the water! Cameras don't like water - especially salt water, so be careful. Remember the rule of thirds and keep your horizon line either to the top or bottom third of the frame. This is more of a hit or miss operation since it’s hard to predict the swell, but that’s why we love digital photography. Keep shooting!