Singers need to take care of their vocal cords and maintain good vocal health, which can involve practices like warming up before performances, staying hydrated, and avoiding smoking and other harmful habits. They may also need to work with vocal coaches or speech therapists to improve their vocal technique and address any issues that arise. Singers need to manage their own career, which can involve negotiating contracts, scheduling performances, and managing finances. They may need to work with lawyers, agents, and other professionals to ensure that they are being fairly compensated and that their interests are protected.