How to make the Sign of the Cross

While correcting my son on how to make the Sign of the Cross, my wife and I got into a little side argument on how this should be done ... so, as whenever I have questions, I turn first to the Internet and found this fascinating article on Wikipedia:

http://en.wikipedia.org/wiki/Sign_of_the_cross

As with all things Christian, I just thought it was interesting and believe that as long as you are thinking of Christ when you make the sign, it really doesn't matter