Rao to answer your question, here are a few things I would do if you were to decide to process the shot you took above.
1. Use a brush from pretty much any of the photo editing software packages to remove the blemishes from his chin and forehead.
2. Use another brush to lighten the dark patches under his eyes.
3. You could have used a little catch light in the photo to bring more life to his eyes, but since that was not done in the photo itself, you can use another brush to enhance his dark iris' to make them more than just black holes.
4. Maybe whiten up the whites of his eyes, especially his right eye which is pretty blood shot on the outer side.
While it will not make this shot a prize winner at the county fair, it will at least make the image better than the one you posted.
You might also want to consider turning on Image Editing in your profile so people can use your image to show you what they are referencing.
Either way, keep practicing and this would be a good one to practice on to see if you can make a rather sour image into at least a good image.