Do Not Do This Cool Thing: "The Fig Leaf" mentions how some authors will describe a titillating scene in salacious detail, then apologize for it by having the protagonist express their distaste. The book recommends against this, and suggests that if exploitative scenes are to be shown, the author should embrace sleaziness wholeheartedly.
Everyone Is Jesus in Purgatory: Discussed in "The Reading Group Guide" in regards to the synopsis, in that you should only bring up facts, lest the synopsis ends up longer than your novel.
Their slam on Shown Their Work throws in a whopper. The biologist mentions sexual reproduction's origin in algae 2.7 million years ago. That error is off by about three orders of magnitude - a factor of about a thousand (to put that in perspective, it's like saying the distance between LA and New York is roughly three miles). We certainly also don't have a common ancestor with algae at this time; any common ancestor between humans and algae would have lived long before this. Due to Stylistic Suck, it's impossible to tell if the authors were sneaking in one more example of how important research is, including a little bonus, or failing biology harder than a Kansas school board while telling authors they cannot afford to make such mistakes themselves.
Other such bonuses show up everywhere. In "The Long Runway", in a moment not related to the subject they're demonstrating, Reynaldo mentions cancelling his pangolin lessons. While "pangolin" certainly sounds like the name of some sort of musical instrument, a pangolin is in fact an animal vaguely resembling an armadillo.
Hilarious in Hindsight: In the chapter about how not to pitch a novel, they warn against trying to sell fanfiction to a publisher, instead advising writers to "go back and change all the names". Three years later, Fifty Shades of Grey, a novel which originated as Twilight fan fiction, was published to massive commercial success.
Shocking Swerve: "Dear Penthouse Letters" is when a sex scene occurs without foreplay, while "'And One Ring to Bind Them!' Said the Old Cowpoke" has a Genre Shift happen near the end of the novel with no buildup. In both instances, it effectively ruins the mood.
This type of ending is a special instance of deus ex machina, known as the folie adieu, which is French for "Are you FUCKING kidding me?"