How many times have you thought, "I wish I'd asked Granny about why she left Indiana," or some equivalent missing piece of the family story.
Family stories may be the most valuable treasure that you pass down to your descendants. Those stories can provide your heirs with a personal history that gives them a sense of where they come from. What's more, stories can also be an incredibly valuable source of information for future archivists and historians. So, tell your story for posterity.
If you're not fond of writing, get hold of a tape recorder and just talk! You may not think that your life story is of any interest, but your descendants certainly will.