I had explained earlier all the basics and techniques needed to start using pastels for illustration.
But I would like to mention that there are no fixed rules and techniques, which one must follow while using any rendering mediums. I believe one must know basics but should explore their own way of using the medium. The more you practice, the more you will explore. And the more you explore, the more you will enjoy the process of using the medium. Nothing is right or wrong!
The following demonstrations are how I perceive the particular medium and not how one must use it. The main purpose is to inspire aspiring artists, being creative and keep exploring!