I listened to an old recording of a LTUE symposium in the 90s. The speaker mentioned about writing on the movie script for Alien so this might be suggests from Ronald Shusett. I may be wrong. I’m not certain if he ever attend LTUE. And I did not label the recording.

• Read a lot of sf/f to avoid duplicate plots and stories.
• You learn how to write by writing.
• Then have anyone you can get to read it and give feedback. And get criticism that can help you improve.
• Writing schools not useful.
• To write a script into a book; you need to get of copy of the books as quickly as possible. Get access to the production picture of the movie and write it.
• Anything can be overcome by perseverance.
• Word processers are great for rewrites because you can more texts around more easily.
• To avoid redoing old plots approach it from a new perspective/angle.
• Write what you love to write.
• Write what you love to read.
• If you like it then someone else might like it.