Use the Rule of the Third Correctly
It might seem a little bit complicated. But actually the Rule of the Third (also named the Golden Section) is pretty simple to use, if you just know how to divide a square into nine equal parts.
Try to turn on your TV. Look for the newsreader at one of the news channels. Is he sitting in the middle of the picture? No, he is placed according to the Rule of the Third in either the left or the right third.
Long before the photography painters found out, that if the main subject was placed either one third or two third from the top and/or from the left, the painting would look more balanced.
To be absolutely correct the right place to put the main subject is not exactly one third (or two third) from the border. There is a complicated mathematically rule that describes the exact place. But it is so close to one third that is fine enough for practically use. So as long as you are not showing your pictures to a mathematician, you will be fine.
So learn from the painters and place your subject in the third parts of the photography. It can be either vertically or horizontal; or both.
The Rule of the Third is especially important, when you are photographing the horizon. A classic mistake is to place it in the middle of the photo. But as you have learned, it will divide the photo in two parts. The result is an unbalanced photo.
So what is the most interesting part; the above the horizon or the one below? Is the sky full of beautiful clouds or is it gray and boring? Place the most interesting part of the subject according to the Rule of the Third.
On some cameras the subject has to be in the middle to make it sharp. In this case you shall just place the subject in the middle of the frame, press the releaser half down and then turn the camera so it points to the subject. Then press the releaser completely down.
Like all other photographic rules it is okay to break the Rule of the Thirds; as long as you do it on purpose and knows what you are doing.