The ability of psychological treatment services to deliver effective and accessible mental healthcare, as demanded by the National Service Framework for mental health, is compromised by the traditional configuration of psychological therapy services, powerful gatekeeping by these services and the difficulties which exist in engaging primary care in mental healthcare. Although a number of service models have been suggested, most address access from the perspective of secondary care service providers. In particular, self-help, a powerful ideology and a clinically effective health technology, is given insufficient prominence in psychological therapy services. Self-help is often only considered for mild problems or as an adjunct to therapy, and it is assumed that mental health professionals with traditional therapeutic skills are needed to support self-help. Following a review of access and self-help in psychological therapies, the present authors propose criteria against which services could be designed in order to fully utilise self-help as a powerful health technology in psychological therapies. Accompanying these criteria is a research framework drawn from recent work on access and illness self-management that can be used to evaluate the performance of services attempting to improve access to psychological therapies.