The sins of the tongue
The Lenten season is a time to engage in a spiritual campaign to strategize how to overcome sin and vice in our lives and to grow in holiness, especially through the aid of prayer and the sacraments.
The first step in doing so is to know what sin is and how it entraps us.
In that vein, I recommend an article on sins of the tongue, by Monsignor Charles Pope, which was published recently in the National Catholic Register.