When we make decisions, we have a subjective sense of confidence about whether our choices are good or bad. Crucially, confidence is usually predictive of objective accuracy, which enables people to use this subjective evaluation to regulate their decision making process in adaptive ways. In my talk, I will present a series of studies exploring how people use confidence in self-regulated decision making: Knowing which decisions to make, when to seek feedback or advice, and who to trust when asking for advice.