The document outlines the four core daily business activities that make a measurable difference to efficiency, effectiveness, and productivity. These "Core Four" activities are: 1) Business Development, 2) Work Product, 3) Keeping Current Clients Happy, and 4) Administrative Tasks. It emphasizes focusing on these areas each day to drive business results and ensure tasks like rainmaking, billable work, client retention, and administrative functions are completed regularly. Proper focus on the Core Four is presented as key to significantly improving one's bottom line over the long run.