1. Don't rush, and keep it grounded in reality.
2. Try not to sound like someone who actually believes in ghosts.
3. Tell the story as if it just happened.
4. The ghost should look like you, only slightly different.
5. Make sure the ghost wants something, and that something involves you.
6. Describing gore will only decrease the fear factor.
7. Deliver your ghost story like it's a genuine warning.
8. Try to answer these big questions in your story: “Who are we, and why are we here?”
9. A ghost story should build, and take place over a long period of time.
10. End the story when the ghost interaction stops.
11. For an extra challenge, try telling your ghost story in the middle of the day to really freak people out.
For more of Glynn Washington's storytelling, tune in to Snap Judgment, which airs weekly on NPR.
And if you live in the Los Angeles area, there's also a live performance of the show happening this Saturday, Oct. 12 at 8 p.m. PT at the Nokia Theatre.