SCIENCE FICTION,Today and Tomorrow. Ed. Reginald Bretnor.  Harper & Row, 1974.  Note that I'm only commenting on the essays which interested me on this rereading. 

First section is SCIENCE FICTION TODAY:  Ben Bova, Frederik Pohl, and George Zebrowski.

Fred Pohl "The Publishing of Science Fiction" gives a good picture of sf publishing as it was at the time. 

His predictions of sf publishing's future?  He gives two tentative predictions.  The one he considers less likely is people printing out books with their home computers.  More likely, he thinks, is microfiche.  No mention of reading on a screen.

And no anticipation of fantasy publishing's rise.  Fantasy used to be the redhaired stepchild; now it outsells science fiction.

George Zebrowski's contribution should have been rejected.  "Science Fiction and the Visual Media" with no mention of television sf?  Years after Star Trek came along?

Second section SCIENCE FICTION, SCIENCE, AND MODERN MAN:  Frank Herbert, Theodore Sturgeon, Alan E. Nourse, Thomas N. Scortia, and Reginald Bretnor.

Third section THE ART AND SCIENCE OF SCIENCE FICTION.  James Gunn, Alexei & Cory Panshin, Poul Anderson, Hal Clement, Anne McCaffrey, Gordon R. Dickson, and Jack Williamson.

Poul Anderson's "The Creation of Imaginary Worlds" and Hal Clement's "The Creation of Imaginary Beings" are both useful for writers. 

Anne McCaffrey, "Romance and Glamour in Science Fiction" -- the only contribution by a woman.  Much intelligent discussion of female sf writers, and of men writing female characters -- well or badly. But also this passage:

"One top-flight writer of sf has been chided for using only one type of heroine:  the sort of earnest, if attractive, females who joined the Communist party in the '30s, the Army in the '40s, did social work in the '50s, and started communes in the '60s.  A girl who would 'die' for a principle.  Great, but girls don't 'die for principles.  Men do.  A girl marries the clunk and converts him to her way of thinking later.  In bed."