Photography is an art form and therefore can be interpreted in many different ways. Your goal is to make it pleasing to your eye. To get there, ask yourself these questions: Who or what is your subject? What captured my attention? Is this the best angle? How can I make this look more interesting?
Defining Your Subject
"If you want your pictures to be better, stand in front of more interesting stuff." - Joe McNally a National Geographic photographer.
Understand that photography is about capturing light. In a broad sense, light is your subject. No one shoots dark. If you do, remove the lens cap. What you need to be able to do is describe what your subject is. If you photograph an old lady walking down the street, consider the details that will be reflected in the image. Is the subject the old lady? Is it the way her hair and the way light is making it look in a particular way? Is it what she is wearing? Your photograph will also be telling a story that will make the viewer think. Is she walking in the morning or evening? What are her surroundings? Where is she going? If she is smiling, why is she smiling?