Sit down for a moment.

Once, someone sat in this chair. They had a reason for being there, a reason they needed or wanted to sit down. They had something to think about and some reason to be where they were. Tell the story of that person and that chair. Start of quickly. Don't worry about background or biography. Just start with that person and this chair. For the first draft, stop when they get up and leave the chair. Later, feel free to go back and add the things that happened before and after. Don't be scared to think outside of the box.