Mike Cohn and I had proposed a “User Story Workout” for the Agile 2009 conference. Our session wasn’t accepted, but I’m making this handout available.
Summary Sheet: Twenty Ways to Split Stories (PDF) (French translation, PDF)
(See the original article if you want a little more background.)
[July 2009.Updated Aug. 14, 2009 to squeeze in “Wm.” Pietri and link to main article.]