If you were entering some sort of witness protection program (changing your name and identity, unable to contact anyone you previously knew or cared about) and could only take along one photograph with which to remember your former life, what would that photograph be? Describe it and explain why it’s so important to you. Or, tell the story of that image. Use any format–journal entry, short story, essay, etc.–but concentrate on one image.
Alternatively, do the same for any fictional character from a story you’re working on.