This document provides an overview of diary studies as a method for studying people in their natural environments. It explains that diary studies yield more objective and generalizable data than many workplace methods as they are less intrusive. The document then outlines how diary studies typically work, including meeting with participants, informing them of what to do, conducting daily interviews, concluding when enough data is collected, and repeating the process with other participants. It provides tips for having a clear focus, selecting and recruiting participants, creating fieldwork materials, planning and executing interviews, looking for patterns and insights, and summarizing findings to make them useful. The document recommends diary studies last less than two weeks or involve less than five interview hours per participant and stresses the importance of