During the scene where Frasier and Niles begin to write in Frasier's apartment, it is clearly visible when the shot cuts to Niles that the screen to his laptop isn't on while he is supposed to be typing.
Niles: (While Frasier is on top of him, strangling him) My god, I'm having a flashback. You're climbing in my crib and jumping on me.
Frasier : You stole my mommy!
Niles: Frasier, while you're over there mixing metaphors like a cuisinart, I've got a brainstorm!
Frasier: Niles, is there a lightbulb over my head?
Niles: You have an idea?
Frasier: (sarcastic) No, I'm asking if there's an actual lightbulb over my head.
Frasier: (while wrestling on the hotel bed) Niles! We're psychiatrists, not pugilists!
(after Niles relaxes) I can't believe you just fell for that!
(Frasier and Niles are writing their book in the living room and Martin won't go)
Martin: But the Sonics game is on twenty minutes!
Frasier: Dad, I solved that problem. I bought you these headphones. You'll be able to listen to the TV without disturbing Niles and me while we work.
Martin: What about Eddie? How's he gonna hear?
Frasier: He can read about the game in tomorrow's paper.
Niles: All my life I have dreamed of one thing: the day I could go into a library, go to the card catalogue and see my name under "mental illness".
Frasier: Niles, I would shave my head for you.
Niles: A gesture that grows less significant with each passing year.
Niles: My research is widely acclaimed in academic circles. Three of my patients have run for political office, but it's your big fat face they put on the sides of buses!
Frasier: I do not have a fat face!
Niles: Oh, please. I keep wondering how long you are going to store those nuts for winter.
Episode Title: Author, Author
The title comes from the 1982 film Author! Author! starring Al Pacino about a playwright struggling to complete his work because of constant demands for rewrites.