If somebody from the past doesn't rise up from the grave and start talking to me, I haven't got a book. I have to hear that voice, the voice of the narrator. How she sounds will tell me who she is, and who she is will tell me how she will act - and that starts the plot in motion.
I open with a clock striking, to beget an awful attention in the audience - it also marks the time, which is four o clock in the morning, and saves a description of the rising sun, and a great deal about gilding the eastern hemisphere.
I used to get stuck trying to find the first sentence of a story, then I realised that it was often because I didn't know what problem a character was facing in the story. As soon as I did, I could have the character trying to do something about it or have the problem whack him between the eyes.
I do novels a bit backward. I look for a situation, a milieu first, and then I wait to see who walks into it.
Among the many problems which beset the novelist, not the least weighty is the choice of the moment at which to begin his novel.
The main thing that I learned from editing is that most people, when they're making a film, they start too early into the story. They will try to set up the characters, they will try to establish things before the plot actually starts.
When I used to teach creative writing, I would tell the students to make their characters want something right away.
How you start the movie is critical. And how often you feel that there's no reason for how it's starting.
It's always hard, when introducing readers to a new world/set of rules, not to lay it all out manual-style in the opening chapters but make sure to put the action and the characters at the front. If people don't become invested in them and in the story, the world in which it's set will become a burden.