Heinlein's Rules

In his 1947 essay "On the Writing of Speculative Fiction," science fiction writer Robert A. Heinlein stated five rules for writing fiction.  Here they are:

1. You must write.

2. You must finish what you write.

3. You must refrain from rewriting, except to editorial order.

4. You must put the work on the market.

5. You must keep the work on the market until it is sold.

He went on to say that he didn't much fear the new competition he'd face from putting these rules out in the open, since he figured ...