"May the Force be with you!" ~ Star Wars Episode IV: A New Hope
"E.T. phone home." ~ E.T.: The Extra-Terrestrial
"I don't know nothin' 'bout birthin' babies!" ~ Gone with the Wind
"After all, tomorrow is another day." ~ Gone with the Wind
"You're gonna need a bigger boat." ~ Jaws
"I've been kidnapped by Kmart!" ~ Ruthless People
"The dingo's got my baby!" ~ A Cry in the Dark // Somehow, this became "The dingoes ate my baby!"
"Here's lookin' at you, kid." ~ Casablanca
"We'll always have Paris." ~ Casablanca
This shows up a lot: "I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I've watched C-beams glitter in the dark near the Tannhauser Gate. All those moments will be lost in time, like tears in the rain. Time to die." ~ Blade Runner
I apologize if I repeated any, but it's difficult to remember the ones already listed. There are so many memorable lines that I could never narrow them down to Top 10, not even Top 100!