From my friend Margaret Ronald (who has a new novel out, btw! Although that has nothing to do with this amusing picture below. But I have a few extras - if you are the first person to comment and ask, it's possible I might send you one for free.)
I assume credit for this flowchart goes to Robert Bolyard, whose e-mail address is in the picture. (Click on the image to make it open bigger in a new window.) Warning for salty language, if you care about that sort of thing.