When Eric goes to show his tattoo to Donna, he kicks her door and the whole set wobbles.
When Jackie is reading Nancy Drew stories to Michael, he asks her to read another one. She agrees and picks up a book called "Nancy Drew and the Mysterious Charming Clock". Although that's what the text on the cover says, the book is actually "The Secret Of The Forgotten City". "The Mysterious Charming Clock" is not one of the Nancy Drew books.
While there was a show called "Packer Report" in the 1970s, Packer/Brewer fans were not referred to as "Cheeseheads" until 1987 when the label was put on them by White Sox fans.. Therefore when Pastor Dave says "I bleed cheese" no one would have taken that to mean he was a Packer fan in 1978, they would have been confused.
Pastor Dave is eating dinner at the Forman dining table with Red and Kitty. As Red gets up to get something from the kitchen, just before Dave gets up, the shadow of the moving boom is visible, along with the dolly cart. Then to the very left, a shadow of fingertips briefly points direction for a second.