Princess Carolyn has a book entitled "Me Meow Pretty One Day" on her shelf in her office, which is a play on "Me Talk Pretty One Day" by David Sedaris, Amy Sedaris' brother.
Greg Kinnear cameos as a marionette of Greg Kinglear and riffs on the title Little Miss Sunshine (2006), which he starred in with Alan Arkin, who plays J.D. Salinger here.
Alison Brie's interviewer characterization sounds remarkably like her wrestling persona "Zoya the Destroya" in GLOW (2017).
When Princess Carolyn is going to work in 2007, you can see on the background stores inspired by 2007 fads, like "Velour track suits", "I'll flip for your flip phones", "My chemical spray tan", "Britney shears hair salon", "Don't take my fro-yo", "Umbrella Ella Ella's", "Nas's big ass chainz", "Eel or no eel", "wii remote straps warehouse", "David Hasselhoff floor burgers".
Also, a man wearing a suit stating "Home loans. No job no credit? No problem!".