I'm going to take a wild guess that really nobody has managed this feat. James tells us that "All kinds of animals, birds, reptiles and creatures of the sea are being tamed and have been tamed by man, but no man can tame the tongue. It is a restless evil, full of deadly poison." (James 3:7-8)
This certainly doesn't give us much hope, does it? But where does James go after this. After telling us that we use the same mouth to praise God that we do to curse our brothers, he explains that if anyone wants to have true wisdom, if anyone wants to live in peace with anyone, we must be submitted first to God. Out of the heart the mouth speaks. Our hearts have to be transformed first, and then the overflow of our hearts will come out on our tongues. God gives us more grace----"God opposes the proud but gives grace to the humble. Submit yourselves, then, to God. Resist the devil, and he will flee from you. Come near to God and he will come near to you." (James 4:6-8) Those are promises we can hang on to, and be hopeful for, when we realize our total depravity apart from the Spirit of God.
The following article came across my email last week, and I thought it was a fantastic reminder of Scriptures we've been given to instruct us on using our tongues in very practical situations.
I encourage you head over to the True Woman blog and have a read.