Keeping your clients happy is really more of an art than a science, but following the maxims above will definitely help. However, most important, you need to remember your clients are people more than dollar signs and act accordingly. All clients bring their own unique characteristics to the table, and you need to learn them, their concerns for their business, and the expectations they hold for both consultants and employees. Knowing the corporate culture and reinforcing it through your efforts probably represents the best thing you can do to keep your clients happy.