Hi there blessedp
I'm just jumping in here to give you my 2 cents worth regarding 'dealing with a narcissist'
If you are a minor-age child or a youth in a home of a narcissist, you might want to get some assistance from your school counselor. Problem-solve around what you can do to be safe and where you can find the kind of caring and supportive adult feedback that you will not be getting anytime soon from the narcissist. And depending on the other mix and range of personality features-- ranging from the self-consumed egotist who more or less lets you live your own life as long as he/she is being served by others to the raging psychopathic narcissist who will not stop at the grossest violations (and violence) to get his/her "needs" met-- you might be better served by living elsewhere (with a trusted aunt or even in a foster home) so you may yourself want to consider approaching social services or, if you have the support to do so, a lawyer.
If you are an independent adult in a relationship with a narcissist, I would suggest that you talk to a psychiatrist or other type of counselor (in a woman's shelter, for example) to explore what your options are and what coping/safety mechanisms you have in place. I don't think that narcissists often change, that is, make an about-turn and become other-directed vs. totally self-centered. If you are sure that this person you are dealing with is indeed a narcissist, then however you deal with them you will have to be ever-cognizant of their over-riding and unrelenting attempts to have their needs met with little regard as to how that might affect others. Are you willing to "deal" with that for the rest of your life?