Option One: Think of someone you really dislike. Co-worker, ex-boyfriend, just someone who you really don't want to be around. Take the things you don't like about them and condense them into a character in a fictional setting. Try to color the scene by bringing out those traits, portraying them, and maybe even trying to bring to light what motivates them.
Option Two: A woman, between the ages of seventeen and twenty-one who can't seem to remember large portions of her childhood. There's no negative association or bad dreams or something to make her worry anything bad happened, but she's trying to create some sort of narrative bridge to explain what happened. It's become an obsession, and now she takes almost every opportunity to try and create some explanation for these little holes in memories.