From the American Film Insistute, some of the top movie quotes of all time include:
#1: "Frankly, my dear, I don't give a damn." (I'm so happy this is number 1, I use this quote all the time!)
#2: "I'm going to make him an offer he can't refuse." -The Godfather
#3: "I coulda been a contender..." -On the Waterfront
#4: "Toto, I've got a feeling we're not in Kansas anymore." (I thought this one should've been higher on the list."
#5: "Here's Lookin' at you, kid." -Casablanca
Other ones that I thought were notable:
#6: "Go ahead, make my day." -Sudden Impact
#8: "May the Force be with you." -Star Wars
#10: "You talkin' to me?" -Taxi Driver
#35: "You're going to need a bigger boat." -Jaws
#37: "I'll be back." -The Terminator
#64: "Gentlemen, you can't fight in here. This is the war room!" -Dr. Strangelove
#68: "Here's Johnny!" -The Shining
#85: "My precious." -Lord of the Rings
#90: "A martini. Shaken, not stirred." -Goldfinger
(I saw the story on Yahoo news, but I can't get to the AFI's website right now.)