The five main management functions of an entrepreneur are planning, organizing, staffing, directing, and controlling. Planning involves setting objectives and determining how to achieve them. Organizing delegates tasks to employees and allocates resources. Staffing involves selecting and developing personnel to fill roles in the organizational structure. Directing includes supervising work, motivating employees, providing leadership, and communicating. Controlling establishes performance standards, measures results, identifies deviations, and takes corrective actions. An entrepreneur must effectively perform all of these functions to manage their business and achieve its objectives.