The best reward system is one that encourages positive behavior and discourages negative behavior. It should be tailored to the individual, taking into account their personal goals and motivations. A good reward system should also recognize effort and progress, not just results. For example, a teacher giving out stickers for completing homework assignments would be an effective reward system because it reinforces the idea that hard work pays off. Rewards should also be meaningful to the individual; a gift card or free dinner may seem small but can mean a lot to someone who is struggling financially. Finally, rewards should be timely; immediate gratification is far more motivating than delayed gratification.