Here's a before and after shot from a portrait I just took the other day to show how I got from the image out of the camera to a finished image (along with a shot of my Photoshop CS4 layer panel).
I shot the cover of our annual EOC issue insert for The Tartan - had one of our staffer's friends come in and model for us. Here's a setup shot and the before and after of the post-processing of the image we chose: