From the Digital Photography School blog.
Are you a stickler for little details? Well, if you’re a photographer, you had better be. Discovering the rule of thirds is a big milestone for any photographer. Suddenly, you realize that all you ever did before was center your subject right smack dab in the middle of the frame, because that’s where the camera’s focus grid is located. Makes sense right? The rule of thirds took you to new heights in your photographic journey, moving your subject off to one side or another in your frame, or to the top or bottom. But don’t some of these photos look a bit crowded being so close to either side of the frame? Sure it works in some cases, but what if there was still another rule you could incorporate into your photographic repertoire?