Hi ReNae,
I am also very interested in what members have to share about painting reflections - I haven't done many, but I love reflected images. In this case, I just sort of followed my resource photograph, and made sure that that the edges, contrast and saturation in the mirror didn't compete with the subject - kind of like I would with any other background object.
As I am having some difficulty with my file sizing, here's the link to "Reflections"
http://portraitartist.com/saper/reflections.htm
Nelson Shanks has a spectacular reflection image of Princess Diana's brother, Charles Spencer; I'll see if I can locate the link.