A randomised controlled study in which a written prompt was sent to new patients to help them make the most of their consultation was conducted amongst patients referred to the dermatology, gynaecology and orthopaedic out-patients clinics at the Royal Free Hospital, London. The impact of the help card on patients' expectations, preparation for and experience of their out-patient consultation are discussed. A help card and letter were sent to a random sample of patients before their appointment to encourage them to prepare and prioritize questions to ask the doctor at the consultation. After their consultation, patients were sent a postal questionnaire to complete at home. Analysis of the questionnaires provided quantitative and qualitative data about patients' information requirements and whether they were fulfilled. The results highlight the difficulties out-patients have in asking questions and discussing topics fully at their initial consultation, even when they have thought of questions in advance. Half the patients who were sent a help card said they got more out of their consultation as a result, yet few statistically significant differences between the help card group and the other patients were found.