I am forever using lines from Monty Python songs "Always Look On the Bright Side" and also Rogers and Hammerstein oldies (There is nothing like a dame or I'm Just A girl who can't say no). The seem built to supply quotes - Also Muppet songs as mentioned above - I can't resist quoting I never harmed an onion every time I peel one.

You could indeed create your daily conversations wholly from songwords, just watch them on Whose Line Is It Anyway.