There are few practices across different project management methodologies that are widely used in corporations and not only during project management. We talk about three of these: Dot-voting, Retrospective and Mood Marbles.

Book recommendation: Scrum Narrative and PSM Exam Guide: All-in-one Guide for Professional Scrum Master (PSM 1) Certificate Assessment Preparation https://www.amazon.com/Scrum-Narrative-Exam-Guide-All/dp/1521475466/