The Rule of Thirds is one of the most basic rules in composition but in my opinion, it is one of the most important rules in composition. The Rule of Thirds can make your shots far more interesting, however, ignoring the rule doesn't necessarily make all of your photos look bland and boring.

When you are composing a shot, you want to envision the photo split into nine squares. This creates four different points. You will then want to place your subject in any one of the four points (for the first shot, the dog's face is in the upper right-hand corner. In the second photo, it is the tree in the upper right-hand corner.) The last photo is a very bad example, though!  The flower is directly in the center of the image which makes it look very unappealing. The Rule of Thirds is an easy and effective way to improve your composition without much practice!