Landscape Photography:
Rule of Thirds
Many photographers consciously or subconsciously use the rule of thirds when composing their photograph. By placing the main subject and other objects of importance about a third of the way inside a photograph from top to bottom and from each side, a more pleasing and more balanced photograph is achieved. To simplify this technique, create an imaginary grid in your mind's eye or imagine it on your camera's LCD when composing the image as shown in image A below.
Like any rule, the rule of thirds is only a general guideline and should not be adhered to on a strict basis when composing photographs.