Let my prayer, O, Lord, be directed as incense in Thy sight; the lifting up of my hands as an evening sacrifice. Set a watch , O Lord, before my mouth, and a door around my lips. May my heart not incline to evil words, to make excuses for sins.
Every time I read this prayer, I think the last two phrases, from Psalm 140, would make a good prayer to guard against the temptation to talk about others. I must commit them to memory and make it a habit to pray them at those times when I am tempted to say something I shouldn't about someone I find irritating!