That’s hard to answer, because I do not follow ideas; I stumble into stories, or I stumble into people who all of the sudden, the situation makes it clear that this is so big, I have to make a film. Very often, films come with uninvited guests, I keep saying like burglars in the middle of the night. They’re in your kitchen, something is stirring, you wake up at 3 AM and all of the sudden they come wildly swinging at you.
So, I try to–it’s not focusing on ideas, but I know exactly what the problem this is. Once you have an idea, it wouldn’t help to sit down and keep brooding, brooding, brooding…just live on but keep it in the back of your mind all the time. Keep connecting little bits and pieces that belong to it. Sometimes it’s only a word, sometimes half a line of dialogue, sometimes an image that you squiggle down. And when it kind of in this way materializes, then press yourself with urgency.
When I write a screenplay, I write it when I have a whole film in front of my eyes, and it’s very easy for me, and I can write very, very fast. It’s almost like copying. But of course sometimes I push myself; I read myself into a frenzy of poetry, reading Chinese poets of the 8th and 9th century, reading old Icelandic poetry, reading some of the finest German poets like Hölderlin. All of this has absolutely nothing to do with the idea of my film, but I work myself up into this kind of frenzy of high-caliber language and concepts and beauty.
And then sometimes I push myself by playing music; in my place it would be, for example, a piano concerto, and I play it and I type on my laptop furiously. But all of it is not a real answer, how do you focus on single idea; I think you have to depart sometimes, and keep it all the time alive somehow.
—from Reddit I am Werner Herzog, the filmmaker. AMA.