To me, the good high concepts are not the maybe the Hollywood logline. For me, coming up with a good science fiction high concept, which is what I do a lot of, is about finding the mirror. It’s about finding what is the human story that you can tell with that little bit of science fiction. On, say, existence — you have the logline, which would be “a physicist finds himself transferred into the body of the hitman that just killed him, and now he has to solve his own murder.
Nick Spencer, from this Writer’s Workshop at Newsarama. This is a long read, but worth it if you’re a writer of any kind but especially if you want to be in comics. It’s alot of process, but there is quite a bit of valuable stuff, especially the stuff about the Mort Numbers which is something I kinda-sorta figured out the hard way.