Weaving Storylines

Write a story with two major threads, each with two characters. For example, the first could be a man and a woman driving in a car–where are they going? what happens along the way? what are they discussing? The second thread could be about two boys in a canoe–do they get along? what is the relationship between them? what happens to cause tension between them? Switch back and forth between each thread, spinning each of the stories. Find a way to slowly weave the stories together: Do the two sets of characters cross paths? Are they somehow related? Is one story something that happened in the past of a character from the other story?