The first step to any good edit is to critique the original image. In this case, there were a few things I really liked about the image – the backlit flying grass for one – and a few things that needed to be fixed, such as the too bright highlights and lack in detail in the soccer player’s jersey, as well as the bright reddish spot in the upper left corner. Obviously the goal of post processing is to make the image look the best it can, so when possible correcting the image’s flaws is the way to go. In this case, I brought down the highlights and whites, selectively darkened the red spot just a touch, and added a slight vignette to the entire image. I also enhanced the part I liked – the backlit grass – by adjusting the curves, clarity, and saturation of this part of the image.
One of my favorite tricks/tools is to use the Darken/Lighten Center filter available through the DXO Nik Collection Color Efex plug-in. I really like this tool because it gives you quite a bit of control over the vignetting effect and tends to make the transition between dark and light areas really smooth. One of the biggest perks of the tool is the ability to set where the center is; I find this invaluable when working with a subject that is slightly off center, as I often want the subject in the brightest area of the photo. Since composition rules often dictate that the subject is not dead center, having the ability to adjust the placement of the brightest part of the image, even just a tiny bit, often makes a big difference in how the final image is perceived.