Interesting article in the New Yorker about writers block and techniques (some) screenwriters use:
Michels also told the writer to get an egg timer. Following Michels’s instructions, every day he set it for one minute, knelt in front of his computer in a posture of prayer, and begged the universe to help him write the worst sentence ever written. When the timer dinged, he would start typing. He told Michels that the exercise was stupid, pointless, and embarrassing, and it didn’t work. Michels told him to keep doing it.
…six weeks later, he had a hundred-and-sixty-five-page script. Six months after that, the script was shot, and when the movie came out the writer won an Academy Award.
Read the full article: A cure for blocked (screen)writers