This topic started as a 
concise and informative discussion 
 with Jonathan Garner and spread to a screenwriting forum.  By request I'm opening the topic here.  Jonathan and I were mulling over movie titles vs. book titles, and that led to some thoughts about marketing.  In short, how does the length of a title affect marketing?  Would we, as book authors, be wise to follow the movie model and use shorter titles?  Here's the post I put on the screenwriting forum to start the discussion:
Movie titles are often short.  1-3 words, simple, direct, often overtly obvious or even plain.
Just running through the movies I’ve seen or heard about recently, I can come up with a ton of examples.  Toy Story, Eragon, Amazing Grace, Astro Boy, Wall-E, Up, Avatar, Inception, Megamind, Fireproof…
Many of the titles are the name of the main character (Wall-E, Bolt, Winnie the Pooh), a group that the main character belongs to (The Incredibles, The Aristocats), or a short descriptive phrase that describes the main character (Kung Fu Panda, The Swan Princess).
Sometimes the title is a main object or key secondary character (Secretariat, Ratatouille) or a location (Canyon Road, City of Ember).  Other times the title summaries the premise (Toy Story, Inception, The King’s Speech) or the plot (Finding Nemo, Facing the Giants).  Occasionally it’s a more poetic word that captures the essence of the film (Tangled, Up, Flywheel, Bellwether).
All these titles are short and simple.  In same cases, they’re even downright boring and direct.  I mean, “Cars”?  How vague is that, really, when you think about it?  Truth be told, words like “Up” and “Bolt” are very simple on their own.
But they work as a movie title.  Why?
Jonathan and I speculated a few reasons why short, even plain, titles can work for movies.  No doubt, it has to do with the way films are marketed.  In summary, I think short titles work because films are marketed through two primary avenues - visual media and word of mouth - and short titles work well in both cases.
Films, being visual, are marketed with a lot of visual media.  Posters, DVD covers, and trailers.  Trailers are the best example - I notice that, in many trailers, the title doesn’t come until the end.  By that time, I’ve sat through 2 minutes of trailer and already know whether or not I want to see the film.  The title does little to sell the film to me; I just want to know the title so I know what to look up at the library or the theater.  In other words, I just need the title to put a name on the images.
A boring title won’t deter me from the film.  For example, with Cars, by the time I got through the trailer I wouldn’t care how epic the title was.  Actually, for Cars, I wouldn’t even have to get through the trailer - if they showed the animation studio logo at the beginning (as they often do, I noticed), I’d be sold just because it’s Pixar.  Which is yet another variable thrown into movie marketing - the “brand label.”  But that’s another can of worms I won’t get into in this post.
The other way movies are marketed, at least in my experience, is word of mouth.  “I saw this,” “Have you seen the trailer for…?”, “This is my favorite film,” etc.  Or, as stated above, “this is such-a-studio’s latest film.”  And in such cases, a short but unique title is incredibly useful.  It’s easy to say “Tangled” and have most people know what you’re talking about, because that was the only major media in recent years with that title.  By contrast, do you know how tiresome it gets to say “Cloudy with a Chance of Meatballs” all the time?  And believe me, I love the movie and watch it frequently, so I have to say it a lot… and it gets cumbersome.
There are, of course, movies with long titles.  But in my experience, most of them are book adaptations that take the title directly from the book.  The Narnia series, Lord of the Rings, Legend of the Guardians: The Owls of Ga’hoole, How to Train Your Dragon, Cloudy with a Chance of Meatballs, etc…  It’s interesting to note that, when friends discuss these films, the titles often get shortened… Narnia (PC, LWW, VDT), LotR, HTTYD…
While there are plenty of books with short titles, long titles are more common on books, it seems to me.  And my guess is, this has to do with the way books are marketed.  Books are marketed through visual media, mostly by the cover, but the written word is a far larger part of their marketing.  Reviews, back cover copy… and the title. If you’re browsing a bookstore or library where the books are arranged spine facing, you only have the title and the author name (the “brand”) to get you to pick it up off the shelf.
I could ramble more but I’m out of time for the night, so I’ll leave it at thus.  Short titles are common on movies.  They don’t even have to be highly creative short titles.  But they work.  Why?  I’ve speculated some reasons - what are your thoughts?  Do you think this same titling approach can work for books as well?
(Yeah, you guessed it - I usually give my books short titles… Faded, Red Rain, Peter’s Angel, Cogs…)*summons Katie and begs her to cross-post her thoughts*