Great post. Its key ideas are: * A dollar has different value to a customer depending on where it falls on the customer's financial statements. * Some dollars

Great post. Its key ideas are: * A dollar has different value to a customer depending on where it falls on the customer's financial statements. * Some dollars require a more effort to earn than other dollars. * A dollar today is worth more than a dollar next year. The post is filled with examples of these three principles.