This is an interesting silhouette, submitted by Sean Wright, with beautiful goldtones in the water. The first thing I'd do is crop off some of the bottom of the frame--the crashing waves add nothing to the tenor of the photo and in fact diminish the overall feel. Then I'd shave a bit off the right of the frame to center the subject so that her head's shadow is dead on center on both axes. It's not the rule of thirds, but there's a tension in her body language and a centered composition will play up that tension.
Online Technology Editor
This photo gets three and a half stars on the PopPhoto Flash rating system.