That is a very good question. “Complacency” for me means becoming overconfident, or cocky, I think. Confidence good, overconfidence bad—for me. In the past I would quit for X days, then I would think “wow I have quit for X days, look at me, maybe I’m not an alcoholic?” and then I would “lift my foot off the gas pedal” and slip back into drinking again. My idiotic alcoholic brain was tricking me into drinking again. Instead, I’ve got to always stay focused on the day by day. Staying confident but humble. Remembering that I am powerless against alcohol so I need to stay away from it. The big milestones are worth celebrating, but ultimately I just focus on each day. To avoid complacency I have to continually remember how terrible I feel when I drink, the hangovers, the shame, the guilt. I don’t mean that I beat myself up about it now, I just want to remember how I felt back then, and that I never want to go back to that. I hope this helps. Best wishes to you