#5 can strain any writer's patience, but I've seen my own work benefit from such persperistence. As for #3, I think there's definitely value in revising one's work; but I take Heinlein to mean "rewriting" as "overhauling" a story in a major way once it's finished -- something we should probably avoid for our own sanity. We could keep tinkering with our work beyond the grave, I'm sure!
- You must write.
- You must finish what you write.
- You must refrain from rewriting, except to editorial order.
- You must put the work on the market.
- You must keep the work on the market until it is sold.
What do you think? Do you take issue with any of these rules? Can you think of a few that Heinlein should have added?