One of the first things I ever learned about photographic composition is the concept of "framing".
Ok, I'm really just making that up, because: (a) I never had any training on photographic composition, and (b) I'm not even sure if the concept I'm thinking about is called "framing". But that's what I call it. It deals with composing your shot such that objects (typically in the foreground) effectively act as a "frame" for your point of interest.
The reason I bring this up is because this week I want to post an old picture I took (using my Droid X phone) of some Youghiogheny river rapids. We had just arrived at the park, and the river was in view. I pulled out my trusty Droid and, without even thinking, walked over to an area where there were trees and bushes along the river bank. I grabbed this shot:
As you can see, the trees on the left and right, as well as the bushes in the center foreground, act as a frame for the real point of interest which, of course, is the river. If you frame things right, it draws the viewer's eye right where you want it to go (which is what composition is all about I think).
I had my SLR with me at the time. (I was actually there for a photography workshop.) But this was just a spur-of-the-moment shot, so I used my phone. It was really just an attempt to get a nice picture to use as wallpaper (which I still use today).
Anyway, this isn't a great photo, but I thought it was nicely framed.