The future depicted in a good SF story ought to be in fact possible, or at least plausible. That means that the writer should be able to convince the reader (and himself) that the wonders he is describing really can come true... and that gets tricky when you take a good, hard look at the world around you.

People as me how I do research for my science fiction. The answer is, I never do any research.

That's what life is, just one learning experience after another, and when you're through with all the learning experiences you graduate and what you get for a diploma is, you die.

That's really what SF is all about, you know: the big reality that pervades the real world we live in: the reality of change. Science fiction is the very literature of change. In fact, it is the only such literature we have.

I was thinking of writing a little foreword saying that history is, after all, based on people's recollections, which change with time.

My first thought was always a cigarette. It still is, but I haven't cheated.

In terms of stories I would buy for a science fiction magazine, if they take place in the future, that might do it.