Effective discipline involves the use of negative consequences, including reasoning as well as modest levels of power assertion, to discourage unacceptable behavior. A brief history of changing views of discipline is presented and recent positions outlined. Successful discipline requires the imposition of clear and consistent rules, autonomy support, perspective-taking, and acceptance rather than rejection of the child. There are different kinds of negative consequences that are evaluated differently by children as well as having different effects on their behavior. In addition, there are individual differences in how children react to a specific form of discipline, and parents need to be aware of what those differences are. Cultural research underlines the fact that the meaning children assign to specific parenting actions is crucial in determining discipline success. When discipline is seen as normative, fair, and a sign of caring its form, within limits, is less important.