This silhouette, from 7's photostream has several elements of good composition and lighting all working together to make a great photo. Can you find three distinct layers of depth in this image? Sometimes this can be done best with a wide-angle lens and strong composition choices.
In the photo below from Pro-Zak's photostream, you'll see another silhouette, wide-angle shot with great lighting and a 30 second exposure. This photo breaks some rules about centering the subject but that's one of the things I like about it.
Head for the art room and use your camera's macro setting. Look for the icon on your camera that looks like a tulip. It will be important to use a tripod or some other steady camera mount. If you don't have anything else, use a beanbag or even your tennis shoe. That's right, take off your shoe and use it to brace the camera to get a nice steady shot.
Use a large aperture for shallow depth of field, as in the photo below. Try a smaller aperture and experiment with that too.
Color and texture are easy to find in the brushes, paints and chalk boxes. The photo below is a great example from Irene Gr's photostream on Flickr.