Simplify your photography.
If you take the time to pay attention and visually simplify what you put in your viewfinder and simplify your process when creating photographs, your work will improve immensely.
The only things that belong in your photograph are what you consider to be the most important things, the only thing that you should include in your process (your process should be thoughtful and intentional) is what you need to do to create a photograph.
Anything extra takes away from the strength of your picture.