Write a letter to the man in the corner shop.
Write a letter to the postman.
Write a letter to an abstract concept.
Write a letter to someone you will make friends with but haven’t met yet.
Write a letter to the popcorn machine at the cinema.
Write a letter to your first memory.
Write a letter in aid of charity or to save someone’s life.
Write a letter for the sheer loving hell of it.
Write a letter to your firstborn, or to someone else’s firstborn.
Write a letter in the style of a new dance craze.
Write a letter that adds up to a hundred.
Write a letter on a bus.
Write a letter to Miranda July (PO Box 26596, Los Angeles, CA 90026 USA)
Write a letter to the kitchen sink.
Write a letter sitting in the kitchen sink (name that book).
Write a letter to the moon.
Write a letter to grandma!