Here's a great quote from Neil Gaiman: "Sometimes I think that when I die, or perhaps as I am dying, I shall be confronted with my characters. Not the ones you would expect, the ones who had their stories, but the other ones."
Who, among your novels, is waiting for his or her own story to be told?
I can think of a few already, and they're not the people I want hovering about when I'm struggling for words, reaching for a caring hand, and gasping for air.
Motivation enough for me. How about you?