When working with a model, you are in charge of the look, the feel, and the pose. It is no different for a self portrait.
You'll want to plan out what you are wearing and how to style yourself. Will you be applying make up? Styling your hair?
You'll also want to figure out what type of self portrait you are going for. A professional head shot? A humorous shot? An insight to your personality? How will you portray you in your self portrait?
How will you pose yourself? What angles look best for you, and how will you work your body to send the message you want to send?
Make sure all of the decisions you make are working towards you being successful in portraying yourself the way you want to, and make sure that all the decisions are helping you achieve the perception you want to achieve so that the same message is being sent to a majority of your viewers.
Photographer, visual artist, mother to four fur-babies, and travel enthusiast.