I'm taking an intro to digital photography class to learn the ins and outs of my new Canon Rebel SLR. I learned quite a few things after the first lesson. Here are some of my photos.
I can control which part of the photo I want to be in focus, and which one I want to be blurry (depth of field)
This is one of the concepts: repetition of elements
The next two photos show the leading line concept. Where you use a line of elements to draw a viewer's eye where you want it to go.