A ream journal is a journal in which dream experiences are recorded. A dream journal may be only a record of nightly dreams, or it may also include personal reflections and waking dream experiences. It is often used in the study of dreams, which is present in various disciplines, such as psychology. Dream journals are also used by people trying to achieve lucid dreams. They are also regarded as a useful catalyst for remembering dreams. The use of a dream diary was recommended by Ann Faraday in The Dream Game as an aid to memory and a way to preserve details, many of which are otherwise rapidly forgotten no matter how memorable the dream originally seemed.