The therapeutic relationship is widely regarded as central to nursing practice, yet the concept is so familiar that it is easily taken for granted. However, like any relationship, a therapeutic relationship cannot be assumed, and to be therapeutic it requires investment from both nurse and service user. This article outlines the theoretical background and fundamental components of the therapeutic relationship, such as self-awareness, reflection and professionalism. The author also describes the skills required to develop therapeutic relationships with service users and introduces a new mnemonic – ATTACH – which encapsulates some of these qualities and skills.