I believe people under-estimate the power of an elegant business photo by a factor of 10.
I think part of the reason most people don't have one, is because they don't know how to position themselves correctly (it feels abnormal at first).
The video below is the most practical I've seen, giving a few, incredibly useful tips for how to take an excellent photo.
Since you'll be posing for a number of photos this Holiday Season anyway, you'll have a chance to try them out. Then after the New Year, maybe hire a professional to take your photo or shoot a self-portrait.
Rather than have your photo (that says a 1,000 words about you in an instant,) not helping you—or worse, that might even be hurting you, ..take one that propels you forward.
It's all about the Jaw. (video)