There are certain things you can do to make your photography more pleasing. There's the rule of thirds which puts the subject in the corners of your photo, where your eye naturally goes. Symmetry is when you completely break that rule and place your subject dead center. You also have texture and pattern where the subject takes up the whole shot. You can alter your depth of field from short and long to change up the picture. Lastly, there are lines to lead you to your subject.

Rule of Thirds: Celena in the grass and dandelion
Symmetry: crack in the road
Texture: tree bark
Pattern: pinecone
Depth of field: plant
Lines: tree