Catechism of Pope St. Pius X (CPX) p. 85-86. Q/A 19-24: The effects and the necessity of the sacrament of penance and the disposition to receive it properly.
– The pneumonic to memorize is C-CAP: Contrition, Confession, Absolution, Penance.
– 15 Mortal Sins Catholics Are Missing in Their Confessions (blog): https://padreperegrino.org/2019/08/mortalsins/
– Tips on making a good confession (video): https://youtu.be/QICKUkEj5WM
– How to Make A General Confession (video): https://www.youtube.com/watch?v=6u1ZjJMBTiw