Horrors of reality, of mere existence and survival, obliterated the imaginary terrors of the past. As we speak, right now, people are still being stoned to death, tortured in prison camps, murdered by drug dealers, kidnaped, raped, shot in fast food restaurants by irate postal workers, starved and taxed. There's so much depravity at all levels we don't have any space left in our psyches for imaginary bugaboos. We have no cultural unity, no common mythology. First you need to know script structure.
Screenplays are blueprints.
Secondly, you should always meet your producer's deadlines, provided they're reasonable and you've agreed upon them in advance. If you're paid to deliver a draft in 60 days, have it ready in 55. Then if you need to make changes, you can deliver the revised draft on time. Producers love that. Buy the best selling book on Script Sales and the source for Who's buying, and What they're buying.