A few minutes ago I was busy retouching a Photo in photoshop. Through my work we contracted a photographer to make some picture of a model. However the photo needed to be edited here and there.
While I was working on it I found this tutorial. It’s a very simple yet easy to do tutorial. You might wanna give it a try.
Depending on the picture it may also be wise to look at the Photoshop Liquify filter. You can easily make models a bit more attractive with that. However watch out you won’t overdo it.