The Sun, Sea and Sand Subject too small Surrounded by clutter or irrelevant surroundings. Fill the frame. Exclude unwanted elements. Go for visual impact. Move closer or switch to a telephoto lens.
Subject is dead centre Picture elements are disconnected, static and lack cohesion.
Study points on composition especially rule of thirds, viewpoint, and leading lines. Move closer, change your viewpoint or change lenses. Blurred, fuzzy or soft shots Don't stab the shutter. Tuck arms into body, assume a stable stance. Support the camera or use a tripod in low light.