Parents should realize that nothing is "free" in life and this attitude will help them to be more consistant with reinforcement.
One of the biggest obstacles to teaching your child is realizing that things in life are not free. Parents or Caregivers will be more likely to reinforce once they accept this basic principle of reinforcement. Reinforcers need to delivered consistently. If your child does do something good then this good behavior should definitely be rewarded. In contrast, if the child is inappropriate then he should not be rewarded. The first step is to try to reward any behavior that is positive. For example, if the child cleans his room or eats his breakfast be sure to reinforce your child. Secondly, when your child cries or tantrums try not to reinforce your child. For example, the most common behavior is for parents to pick up and hug a child when he cries. In contrast, the parent should realize that this would be giving a reinforcer for free. The child has not performed any appropriate behavior yet he is reinforced. We all work to get money for food and things that we want. We know that we will probably loose our job over time or not get commissions if we do not work. Consistent reinforcement of behavior will lead to rapid learning and appropriate behavior.