I dunno about Godfather quotes right now, but I've been using some Donnie Brasco quotes lately, especially:

Quote
"Fugghedaboudit" is like if you agree with someone, you know, like "Raquel Welsh is one great piece of ass, fugghedaboudit." But then, if you disagree, like "A Lincoln is better than a Cadillac? Fugghedaboudit!" you know? But then, it's also like if something's the greatest thing in the world, like mingia, those peppers, "fugghedaboudit." But it's also like saying "Go to hell!" too. Like, you know, like "Hey Paulie, you got a one inch pecker?" and Paulie says "fugghedaboudit!" Sometimes it just means forget about it.