For instance, in a fairy - tale - like story, a princess is locked in a tower. Many knights try to rescue her but fail. Then a young shepherd boy comes along. He doesn't seem like a likely hero. But he has a special whistle that can call magical birds. The birds carry him up to the tower and he rescues the princess. The whistle and the magical birds are the 'one more thing' in this story. Another example is a story about a painter. He's been painting landscapes but can't seem to sell any. One day, a famous art critic visits his studio by accident. The critic loves his work and writes a great review. The art critic's visit is the 'one more thing' that changes the painter's fortune.
Sure. One example could be a story about a girl who is trying to find her lost cat. She searches everywhere, asks all her neighbors. Just when she gives up hope, she hears a meow from the attic. That's the 'one more thing' - the unexpected place where the cat was. Another example is a story of a young entrepreneur who has had a lot of setbacks in his business. He's about to close it down, but then he gets an email from an overseas investor interested in his idea. That email is the 'one more thing' that changes his whole situation.