Pretty Good Advice for Writers: In Reverse

"Rules for Writing a Fantasy Novel"

There's some truth in this. Also, this is a sort of laundry list for writers: of what not to do.

From
"1. The heroes will lose every battle, but win the war."
to
"19. Rulers of any large territory (eg. Kings, Emporers, etc.) are either terminally stupid or insane, and could not suppress a rebellion if their life depended on it (which it usually does)."

There's also "Additional Rules for TSR Writers"

From
"1. Only under exceptional circumstances will you be allowed to write the sequel to any novel you write."
to
"7. All books will be between 300 and 320 pages."