Remember that some models feel that they have earned ever one of their wrinkles, and don't want to hide even one. A double chin can be hidden by raising the main light or using a high camera angle. This stretches out the skin under the chin and even lengthens the neck a little. I often have a model push her chin forward. It's a fast and easy solution to this problem.
Eyes can sometimes be a problem.
If they protrude, have the model look downwards. Her eyelids and eyelashes will help to partially conceal the eyes. For sunken eyes, lower the main light to eliminate the shadows in the eye sockets or use a lower lighting ratio. To hide large ears you can shoot your model in profile, use a scarf or vailed hat to cover the ears, or hide the far ear behind the head and place the near ear in a shadow. If your model has long hair, you can use it to hide large ears too.