Look through some of your old family photos, taken before you were born. Pick an image that you feel drawn to, then try to imagine your way into the moment. What were these people thinking, doing, feeling, and why? Write a short story about it.
Write a romance. You can make it anything between rom-coms and Romeo and Juliet, but make sure there are two characters in love, and at least one obstacle (internal or external) to that relationship.
More often than not, we write stories in the first person (I) or the third (she or he). Today we have a new challenge: write a short story narrated in the second person—i.e. “You open the door. You see this…”