Select the background, make sure that the frame is not discarded people and objects. In order to focus on the subject, use a telephoto lens. But don't get carried away with shooting only fragments, photographed on the background of the environment, to make it clear exactly where the picture was taken.
Ask the person to take a position, help him in this. Try to make the pose showed a man and helped hide his flaws.
If you are doing a portrait image, the capture point will serve as the human eye level, as if the in full-length a - line waist. Place the camera lens in front of the subject, otherwise the proportions may be distorted. If you are photographing people not in full height, not "cut" the legs in the middle of the ankle or hip. Better if the edge of the picture will be falls on his knees, waist, elbows ensure that everything was logical.
Perfect time for shooting on the beach in the morning or evening when the light is soft enough and gives the same soft shadows and midtones. It is desirable that the sun was behind the photographer, but at the same time avoid blinding the model.
Thanks! If you are photographing people, it doesn't necessarily have to be only portrait photography, and not necessarily the subject should be at the center of the frame. Position person in the right half of the photograph, then the viewer's brain, accustomed to read from left to right, he will complete the story.
Turn on the imagination. Use objects on the beach: beach chairs, shells, pebbles, slates, towels, bottles. Go into the water and take the water level.