Balance

With a pair of shoes as the photos' subject, balance is a relatively easy technique to employ. One can see that it is simple to have a symmetrical balance, as displayed by the middle photo, since the two shoes can "reflect" each other so well. It is for that reason though, that I provided two asymmetrical images of the shoes. The top and bottom images show the shoes not in a perfect "reflection" or perfect symmetry, but rather the photo has that sense of balance in a way that the two shoes, without complimenting each other, complete the image as a whole.