It’s an “act,” rather than a “rite.” Calling it an “act” more strongly conveys the reality of both our sins and our true sorrow for them. One option for the act is the “Confiteor”—I confess to almighty God…). In the new translation, we will admit that we have GREATLY sinned. And striking our breasts, you and I will confess that we have sinned “though my fault, through my fault, through my most grievous fault.” As you practice the enhanced penitential act, and when we actually begin to use it, please God may the words we say add to a more humble disposition as we prepare to celebrate the Mass.
For a downloadable PDF file of all the responses to the Mass, do go here and, in the lower right corner, click on the word "here."