Qualitative diary methods (QDMs) are a versatile range of multi-modal data collection methods that involve participants recording events and experiences, and emotions and reflections, as they happen, on multiple occasions and over a particular time period. These data collection methods include a pen and paper diary, as well as other electronic modes of diary keeping, including text but also audio, photo-, video-, and app-based diaries that allow for a range of modalities. This book covers the diversity of QDM options available to researchers, providing a clear rationale as to when and why different qualitative diary methods could be used. The authors consider research design, and ethical considerations for each of the distinct QDM approaches and provide end-of-chapter checklists and activities to help readers apply the methods to their own research.