Janners, maybe you should forget about compositional rules such as Thirds, and all the other mumbo jumbo so beloved of camera club judges Composition is a complex creative thing, and shouldn't be constrained by rules. My own approach, when confronted by an interesting subject is to let the subconscious, intuitive part of the brain take over. I try not to think consciously. I find a clear, bright viewfinder is a big help. I simply look at the subject in the viewfinder, and find myself responding to it by moving in a bit, or out a bit, or to one side, or tilting the camera up, or down, a bit. I also keep lowering the camera so I can look directly at the subject, to assess areas of the subject outside what the viewfinder is showing. And when everything "feels" right, I press the shutter.