Consider all of the elements of film making. In adapting the script, which pieces would you cut or change? Would you add anything to make things clearer, or to make the cast larger? How true would you stay to the text? Which lines do you think would end up on IMDB as "memorable quotes"? What would you use as a tagline, in the advertisments for the film?
As with all movies, you would have to decide which character you wanted to consider the "main" character. Which character would you have the movie center around and why? Would you change things in order to make certain characters more sympathetic?
What would your general vision for the piece be? Would you do it in period dress? Would you modernize it? Make it a Western? Would you turn it into a science fiction teen angst television series? What genre would you classify it when it was sent to the box offices? What rating do you think it would get?
Finally, who would you cast? Who would play Theodore, Isabella, Manfred, Matilda, Frederic, et cetera? Why would you cast those people?
Though this does not seem as textually deep as many of the questions posted are, I think we can learn a lot about our readings of the novel by examining what we would keep or cut and who we imagined each character as. I think that examining a text in this way helps us look at the novel as a sort of co-creater, giving us insights into a basic justification of the text. In reading as a director, slashing anything unimportant from the script, one starts to understand what about the text really matters.