What I have for you today is a link to a tutorial that shows you one method for retouching skin for portraits. When it comes to computers there are usually lots of ways to accomplish the same goal and retouching skin is no exception. This technique will come out with a very nice airbrushed look. If you like natural, maybe not the way to go for you, but it is always good to have the knowledge in your head in case you ever need to come back for it.
You can check out the link here. Enjoy!