Motivational interviewing (MI) is a clinical method for helping people to resolve ambivalence about change by evoking intrinsic motivation and commitment. Based on our research and experience in providing training on MI, practitioners acquire expertise in this method through a sequence of eight stages: (1) openness to collaboration with clients' own expertise, (2) proficiency in client-centered counseling, including accurate empathy, (3) recognition of key aspects of client speech that guide the practice of MI, (4) eliciting and strengthening client change talk, (5) rolling with resistance, (6) negotiating change plans, (7) consolidating client commitment, and (8) switching flexibly between MI and other intervention styles. These key skills are acquired roughly in order, with earlier steps representing logical prerequisites for later stages of skill acquisition.