4. Make it Symmetric (and Then Disturb Your Symmetry)
Rules, of course, are meant to be broken. The rule of symmetry is all about capturing the natural symmetry in nature. There are a few ways to do this. You might shoot a scene in which both sides of your photo are essentially the same, for example. Or you might shoot a photo of something that is itself quite symmetrical, like a flower.
Even better, though, is when you incorporate a lesson from the rule about monotonous content and shake things up with a little variation. Surprise the viewer, either by making one side of the photo non-symmetrical, or, in this example, defeat the symmetry of the flower by shooting only part of it in the frame.