Composition #1 - The Rule Of Thirds

Theory
Try to put the main point of interest in your picture at one of the intersections of the thirds:

Or devide the sky/land line on a 1/3rd 2/3rd ratio. Try to avoid putting the horizon half way down the picture.

Examples

[Over The Rainbow - horizon on the lower third, protruding flower is on the horizontal and vertical third intersection]

[Sunrise, Calanais - horizon on the lower third, sun is on the intersection of the horizontal and vertical third]

[Pienza Hillside - high horizon on the upper third]

[Pencils IV - point of focus on the left hand third, but half way up this time]