This has nothing to do with the photos you've posted: not that I have anything to say about your shots but what I wanted to say has been covered for the most part already - so my advise (to help you improve) is...
...learn even when you're not holding a camera. If at a movie theater, or watching a dvd movie, be aware of the cinematography. If leafing through a magazine or a newspaper, be aware of examples of glamour/product photos, as well as fine examples of photojournalism. And if you are just walking about and if something catches your attention, ask why and how you would go about capturing that why -- unusual lighting, pleasing composition, similar shapes, symmetry/asymmetry, hierarchy, datum, positive/negative interplay, continuity, substitution, illusions... to name a few.
Keep those cogs in your mind working all the time.
Now scram !