As I wrote in a previous entry, one of the best ways to become a better photographer and to hone your composition skills is to look what others are doing. Of course that makes most sense when you look at the work of real masters. Photographers that have received prizes and honors for their work.
You are probably not aware of it, but I am pretty sure that you at some time have seen a photo by the Danish photographer Søren Solkær Starbird.
One of the best ways to learn about photographic composition is to look at what other photographers do. This article gives a couple of hints on what to look for and a few examples of where to look.
With the entrance of full frame Digital SLR cameras it's only a matter of time before they reach a price where everybody can participate. When this happen your DX format lenses will be useless and worthless. Here's a suggestion for replacing your DX lenses and at the same time have money left towards your FX camera body purchase.