These are all disciplines that, when actively pursued, lead to greater development, evolution, productivity and fulfillment. Each of these can become a discipline to be worked on daily or periodically at different levels. For example, Planning is a discipline that when worked on daily might mean writing your schedule for the day ahead or, when worked on quarterly or annually might take on greater proportion for the longer time period. The underlying current that must be understood in order to apply each of the first Eight Disciplines effectively is the Ninth Discipline.