First, you should probably practice "the routine" before going out tonight:

Nail it? Good. Now, enjoy some of the most romantic, humorous, classic, depressing, and real moments portraying New Year's Eve on the big screen.

When Harry Met Sally: "It's not because I'm lonely, and it's not because it's New Year's Eve. I came here tonight because when you realize you want to spend the rest of your life with somebody, you want the rest of your life to start as soon as possible.”

The Apartment: "Shut up and deal."

Radio Days: "Only creeps and crazy people go out on New Year's Eve. There are those who drink champagne at nightclubs, and those who listen to them drink champagne on the radio."

Ghostbusters 2: "It's slime time."

Sex and The City: "I thought that one of the perks of having a family was that you didn't have to spend your New Year's Eve alone with Chinese food. I'm alone with Chinese food."

200 Cigarettes: "Drinking, fighting, lovin' the ladies, it's the obligation to enjoy yourself, that's what does it, every year it's the same desperate scrambling around to surround yourself with as many people as possible. Go to some stupid party, pretend to be happy..." (more here).

Trading Places: "Merry New Year!"

The Godfather, Part II: There's no better way to ring in the New Year than by kissing your brother on the lips, grabbing his skull, and telling him how he broke your heart.

And finally, a supercut: