The bell that rings immediately prior to Mike (Jonathan Banks) being approached by Hector Salamanca (Mark Margolis) in the café, is identical to the bell that Hector has on his wheelchair in Breaking Bad (2008).
At the beginning of the episode Jimmy (Bob Odenkirk) talks about finding a place at the Beachcomber - the same apartment complex Walter White (Bryan Cranston) lived in Breaking Bad (2008) after moving out of his home.
The bench that appears during the title sequence is the same one where Badger gets arrested in Breaking Bad S2E8, which also marks the first appearance of Saul in that show.
In the introduction, when Chuck (Micheal McKean) is talking to Rebecca, he says that they should have a high sign just in case they are so bored with Jimmy they want to make up a lie and call it a night. Doing so, he suggests "the Carol Burnett thing". Carol Burnett will join the cast of the show in the last season to play Marion, Jeff (Pat Healy)'s mother.
In the pilot for Breaking Bad, Walter White pulls his life savings from a bank called Mesa Credit Union, the logo for which is green. The name Mesa Verde may be a reference to this bank, as Verde is Spanish for green.