Painters have a canvas, photographers have the view finders frame. The viewfinder's rectangular shape is our canvas and we should put thought into every aspect within this rectangle. The arrangement of all the different elements, from the placement of the subject to what appears along the edges, is what
composing is all about. A well composed photograph is like a great piece of music, it sings.
Take the time to frame each one of your images, be aware of the edges including only what you want and nothing of what you do not want. Give your Photoshop crop tool a vacation - compose in camera.