Models must interact with a large number of people, so it is important to be polite, professional, prompt, and respectful. Almost all models work with agents, who provide a link between them and clients. Clients often prefer to work with agents, which makes it very difficult for a model to pursue a freelance career. Agents look for “fresh faces,” advise and train models, and promote them to clients in return for a portion of the model’s earnings. Models spend a considerable amount of time putting together and maintaining portfolios, as well as scheduling and travelling to meet potential clients. A portfolio is a collection of a model’s previous work and is carried to all client meetings and bookings. Competition for jobs is strong and clients’ needs are specific, so patience and persistence are essential qualities.