Composition In Digital Photography
Good Composition is a key element of good photographs yet is something that is hard to define.  Instead of looking at composition as a set of ‘rules’ to follow – I view it as a set of ingredients that can be taken out of the pantry at any point and used to make a great ‘meal’ (photograph). Alternatively I’ve often described it as a set of ‘tools’ that can be taken out of one’s compositional tool belt at any given time in the construction of a great image.

Rule of thirds
The rule of thirds is applied by aligning a subject with the guide lines and their intersection        points, placing the horizon on the top or bottom line, or allowing linear features in the image to flow from section to section.

The Golden Rule
The Golden Rule or ethic of reciprocity is a maxim, ethical code or morality that essentially states either of the following: One should treat others as one would like others to treat oneself.

Vertical and Horizontal Lines

Vertical lines have the ability to convey a variety of different moods in a photograph ranging from power and strength (think of skyscrapers) to growth (think of trees).

As horizontal lines can be accentuated by shooting in horizontal format vertical lines can be used very effectively by swapping the way you hold your camera into a vertical framing. This lengthens the vertical subject further which can emphasize it’s height.

Oblique Lines

Diagonal lines generally work well to draw the eye of an image’s viewer through the photograph. They create points of interest as they intersect with other lines and often give images depth by suggesting perspective

Curved Lines

Curved lines are all about beauty and charm. The best example of this would be a beautiful female form with all its lines and curves. Of course there are other examples: The curve in a river or a pathway through a flower garden.