Gosh there's a LOT that is left out on the recurring things.  Jack and Fred Allen's "feud" that went on for years.  They hated each other over the air and in personal appearances but it was actually a well thought out process and written so.  Jack and Fred were actually very good friends. 

 All of the sound effects like the vault with the footsteps and clanking chains for the drawbridge and finally the sirens and horns.  You could just picture it all in your head.  Then the voice of Jack's long faithful guard, Ed, "Halt!  Who goes there?  Friend or Foe?"  Friend.  "What's the password?"  Foe.  "Oh it's YOU Mr. Benny!"  And then a conversation would result in showing how many years Ed had been locked down in the vault. 

 The train station with Mel Blanc announcing "Train leaving on track 5 for Anaheim, Azusa and Cuc.............amonga!" 

 Frank Nelson always jumping in there with his trademark, "Yesssssssss?"  Or sarcastically retorting to questions asked by Jack, "Well who do you think I am with this red jacket on?  Santa Claus?"  Frank Nelson was always a clerk of some kind and couldn't stand Jack and they bickered back and forth. 

 The stranger on the street saying, "Pssssst!  Hey Bud!" and going into this ridiculous routine. 

 Ronnie And Benita Coleman living next door and always dreading Jack getting involved in their personal life. 

 The play on words like the "Cimmaron" rolls.  "No he's right Jack!  Look here at this label.  These Cimmaron rolls are not made like traditional cinnamon roles which are made of entirely different ingrediments."   

 The "Oh Shut Up" phrase being used all the time.  Phil Harris and his drunken band.  Don Wilson's weight.  Dennis Day's "dumb Dora" type character with his mother always getting involved trying to get Dennis a raise and arguing with Jack. 

 Polly the parrot.  When Polly had a cold Mary asked, "Polly want a cracker?"  "Polly want a Kleenex - AHHH CHOO!"  Then the next week Polly still had a cold and Mary asked, "Polly want a cracker?"  "Polly wanna die!" 

 Jack's violin teacher Professor LeBlanc who tortured himself given Jack lessons and making him play scales to which he would sing along, "Play it softly, play it tender.  Where can I go to surrender?"   

 The "I Can't Stand Jack Benny Because" contest. 

 The operators Gertrude Gearshift and Mable Flapsaddle.  They threw insults back and forth at each other.  After waiting on Gertrude to dial a number he would yell at her and she would say something like, "Okay!  Okay!  I'm ringing it!  You know Rome wasn't built in a day!" 
 Well you oughta know!  You helped build it! 
 "Well Thank you Julius Caesar!" 

 The laundry business Jack had on the side.  Little old ladies loved him, "When I think of him ironing my petticoats with his own little hands....I get GOOSE PIMPLES!" 
 "I sent him a Valentine's card in my laundry bundle.  It went, Dear Jack - when I think of you this Valentine's Day I can throw my vitamin pills away." 
 I bet he didn't answer it. 
 "He certainly did!  He said - Your lovely poem made me shake and shiver.  And starting May first, we pick up and deliver."