There are two approaches to discipline- the carrot or the stick approach. If the parent uses the persuasive carrot approach, the response is quick. In the long run, this technique isn't effective in the child's psychological development. If the parent uses just the stick approach, it kills the child's inner desire to achieve and behave for himself.
Obedience is only to avoid punishment.
Rewarding positive behavior with material things does not work in the long run. Children may tire of the external reward and refuse to obey. Discipline by teaching the internal reward of satisfaction for their good behavior. Discipline is best taught during the preschool years. This is when the child is most receptive to parental guidance.