1. Who's Afraid of Virginia Woolf? (1966) Michael Ochs Archives / Getty Images You're going to host at least one dinner party, so here's what you shouldn't do. 2. The Apartment (1960) United Artists / Via thesilverscreenaffair.blogspot.com Because you want to shift from a bachelor lifestyle to a more professional one. 3. Frances Ha (2012) IFC Films / Via jamesdmccallister.wordpress.com It's HBO's Girls, only more realistic. 4. Mildred Pierce (1945) Warner Bros. / Getty The perfect parenting guide of do's and don'ts. 5. Some Like It Hot (1959) United Artists / Via drafthouse.com Proof that you'll do anything for love, which includes cross-dressing. 6. It Happened One Night (1934) Columbia Pictures / Via movieclassics.wordpress.com Because you need to learn how to hail a taxi with your bare leg. 7. Double Indemnity (1944) Paramount Pictures / Via fact.co.uk It shows you how to make a quick buck, but in the darkest way possible. 8. His Girl Friday (1940) Archive Photos / Getty Images Because you're going to get stuck in at least one love triangle. 9. On the Waterfront (1954) Mondadori / Getty Images It'll help you distinguish between your friends and your enemies, all while staying loyal to yourself. 10. City Lights (1931) John Kobal Foundation / Getty Images A much-needed reminder that love is not determined by money. 11. To Kill a Mockingbird (1962) Archive Photos / Getty Images The perfect example of how to be a father and a better person. 12. Dr. Strangelove (1964) Columbia Pictures / Via georgesjournal.org Because you'll sometimes feel like the world is ending. 13. Harvey (1950) Universal International Pictures / Via doctormacro.com Because some people are going to think you're crazy. 14. Sullivan's Travels (1941) Mondadori / Getty Images The protagonist is still searching for his place in society, just like you. 15. 12 Angry Men (1957) CBS Photo Archive / Getty Images Everyone needs to be reminded that you shouldn't judge a book by its cover. 16. High Noon (1952) United Artists / Via chris520.wordpress.com Because you'll need to be someone's hero. 17. The Grapes of Wrath (1940) Archive Photos / Getty Images If you ever feel down about your financial troubles, just look at this film in retrospect. 18. Ace in the Hole (1951) Paramount Pictures / Via doctormacro.com A reminder of what's truly important in life. 19. Casablanca (1942) Popperfoto / Getty Images Because, kid, you need to learn about love and sacrifice. 20. The Philadelphia Story (1940) Archive Photos / Getty Images A guide to finding a relationship — and, inadvertently, yourself too. 21. The Maltese Falcon (1941) Archive Photos / Getty Images Because you want a friend who will do anything for you. 22. Sunset Boulevard (1950) Paramount Pictures / Via 1001filmsyoumustsee.blogspot.com Because you have to learn how to say "no." 23. Gentleman's Agreement (1947) 20th Century Fox / Getty Images Because no one is better than you, but you're certainly not better than anyone else, either. 24. The Best Years of Our Lives (1946) RKO Radio Pictures / Via nighthawknews.wordpress.com Proof that life changes, and you have to adapt. 25. Manhattan (1979) United Artists / Via myblackballoon.tumblr.com It inspires you to find faith in everyone, even if you struggle with commitment. 26. Grand Hotel (1932) Metro-Goldwyn-Mayer / Via doctormacro.com Because sometimes you'll want to be alone. 27. Psycho (1960) Paramount Pictures / Via moviemadnessvideo.com Because you don't want to let go of your final piece of innocence... or your mother. 28. The Third Man (1949) Ernst Haas / Getty Images Because your moral judgment will always be in question. 29. Roman Holiday (1953) Popperfoto / Getty Images It suggests that you need to take a break from your hectic life. 30. All About Eve (1950) Universal Images Group / Getty Images A love story of friendship and betrayal that reminds you that growing up is not optional. 31. It's a Wonderful Life (1946) Liberty Films / Via drafthouse.com Life is going to knock you down. This film explains why you should get back up.