How to train your dog to not bark or jump on people coming over

Good manners is what you would like from your dog when someone knocks on the door right?  How often do you get them?  This is the first step in teaching your dog that it's ok to have people knock on the door without them "singing you the song of their people" aka barking or getting really excited.  Now at first I am really excited when I say the word "people" because I want the training to be fun, but as I do it more and more often soon it will be like the word "sit" and she will know that I want her to lie down and wait for me to call her.  Right now when someone knocks on the door she gets to it before I do, then it's a problem to get her back up stairs and out of the way, meanwhile someone is left standing outside not knowing if I am home (unless they hear the ruckus).  So this is what I decided to to and I thought I would share it with you! http://youtu.be/wYa761-xaYo