The first step is prayer and study. Prayer so as to love people with a sincere heart. To be moved by the sight of hunger, sickness and moral suffering brings us into line with the sympathetic heart of our Teacher. But even more worthy of our compassion are those who do not know God, Jesus Christ, or the Church; all those who are blinded by error and prejudice or overwhelmed by vice.
You need to study their errors, difficulties and objections in order to give suitable instruction, to reply clearly, to use the proper means.
1. Convey Christianity as the religion of goodness, order and peace.
2. Prepare an introduction to the study of Christian doctrine; this acts as a preliminary stage to the basic notions regarding doctrine, morals and worship.
3. Treat people with patience, respect and constant kindness; be like Saint Francis de Sales ...
4. Avoid becoming ill-tempered: show yourself to be conciliatory to the limits of truth; avoid questions of pure politics; be dignified, honest and sincere; admit what is or was truly a mistake.
5. Combat error and sin, not the erring or the sinner; if possible always leave the way open to take up the written or broadcast debate later on.
6. Make abundant use of the defense of truth and justice; employ discussion with a great deal of prudence. Polemics, too, requires greater intellectual preparation, greater love for the truth, greater spiritual balance. To avoid becoming emotional is a great virtue.
What would you add?