Another effective writing exercise is to consider two photographs taken at different times (decades apart, or a few minutes) or your own mental images of yourself or another. Or photos or mental images of places.
Write a few words to orient yourself with each image – who, when, where. Add a word or two about the feeling or emotion most prominent when you think of each image.
Now spend a few minutes writing about the time between the images. What changed for the person in the image?
Go deeper: Return to the images a few more times over several days or weeks. Guaranteed, you’ll come up with more to say, questions you’d like to ask (or wish you could ask). Write about that.