"James 3: A Story" - produced by Desiring God. This little film was made to go along with the theme of the 2008 National Desiring God conference two weeks ago on the power of words. I recommend listening to as many of these messages as you are able to (free to download).
James 3:8-10 says, "but no human being can tame the tongue. It is a restless evil, full of deadly poison. With it we bless our Lord and Father, and with it we curse people who are made in the likeness of God. From the same mouth come blessing and cursing. My brothers, these things ought not to be so."
My misuse of the tongue is a constant reminder to me that I am deeply in need of grace from God. That if I were judged based on my own standards, I would be worse off than those I've judged, and that I am so grateful for Christ who cleanses me from all sin with His blood, not only that, but even changes what comes out of my mouth by His grace.