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Current technology makes it possible to capture huge amounts of information related to everyday experiences. Despite this, we know little about the processes by which people identify and manage mementos - objects which are directly meaningful to their memories. Among the millions of objects people encounter in a lifetime, few become such reminders of people, places or events. We report fieldwork where participants gave us a tour of their homes describing how and why particular objects become mementos. Our findings extend the existing digital memory literature; first our participants didn't view their activities as experiential 'capture', nor were mementos limited to pictorial representations of people and events; instead they included everyday objects. Furthermore, mementos were not only displayed and shared, but also integrated into everyday activities. Finally there were complex relations between house location and memento type. We discuss the theoretical and technical implications of our work.