Picture composition, the rule of 3rds.
To make an image more interesting apply the rule of 3rds, this is to place the subject in one third of the frame. This means the eye looks at the centre of the image and immediately drawn the main subject of the image.
For images of landscapes the rule of thirds can be used as well. The subject of a tree to the left or right of the frame. A stream or track that starts in the bottom third frame and it leads across the frame towards the midle centre of the frame.