I took this swamp tree shot and went with NIK HDR Efex Pro "tone mapping" (since it was a single photo) to see what I could come up with. I chose the "vintage" preset and went from there with the sliders moving until I was satisfied. Then, bringing it into CS5, I used some of NIK's tools like the "darken/lighten center" preset and some general dodging and burning here and there until I liked the results. I think the "vintage" faded edges along with added contrast to the tree created the overall mood and drama I was looking for. I added sharpening only to the tree itself to put the focus where I felt it belonged.