The document discusses apologizing, interrupting, and excusing oneself. It defines these terms and provides guidance on when and how to appropriately engage in these social behaviors. For apologizing, it notes we should take responsibility, provide reasons, and make promises to remedy issues. Interrupting should be done at natural breaks in conversation or with nonverbal cues. Excusing oneself allows one to politely interrupt, clarify statements, or take leave. Common phrases for these social actions are also outlined. The document aims to improve social skills through understanding proper etiquette around apologizing, interrupting, and excusing oneself.