"In the case of "Changeling," screenwriter J. Michael Straczynski had 6,000 pages of documents relating to the case of Christine Collins (played by Angelina Jolie), a woman in Los Angeles in the late 1920s convinced that the missing child returned to her by police was not her son. The challenge for Straczynski was shaping them into concise cinematic form, and for that he simply applied his stringent daily writing regimen.
Typically, Straczynski writes new material from about 8 p.m. until 4 a.m., crashes for a few hours, gets up and revises the previous day's work from about 1 or 2 p.m. until 8 p.m., then starts the process all over again. Once he had the structure of "Changeling" worked out, he was able to pound out the script in 11 days.
"I write 10 hours a day, every day, except my birthday, New Year's Day and Christmas," Straczynski boasts. "I've had two vacations in 20 years.""