Horizontal or Vertical

The first thing you must decided before taking a picture is Horizontal or Vertical.  There are many ammeter pictures I see that could be better if the photographer had simply chosen to shoot vertical instead of horizontal, or vice versa.  Skyscrapers, if shot from the ground, create a vertically strong theme and therefore the image should be composed as a vertical.  Boats and cars and items that are longer than they are tall should be composed as a horizontal.