Blur your eyes and try to identify separate elements in the image and large areas where the same texture and color reside (i.e. a forest, the sky, clouds, a mountain, a more distant mountain). Determine four or five different elements that you would like to represent, keeping in mind that each section will be its own distinct color.
Sketch the picture on a sheet of paper, only including the outline of the elements you chose, and identify each section, noting their position in space. Which section is closest to you? Which is furthest away? Which lives in between the two?