Aphorisims for Writing Science-Fiction

Mostly, these apply to fantasy, too.
David Alexander Smith, a member of <a href="http://www.sfwa.org/">SFWA</a&gt;, has written <a href="http://www.sfwa.org/writing/aphorisms.html">a fine article about things to think about and watch out for while writing speculative fiction</a>. Honestly, though, these are all things that any good writer in any genre should be doing. Certainly, writers of speculative fiction (ie. fantasy and science-fiction) have certain special considerations, but, for the most part, good writing is simply good writing. And, that's what Mr. Smith has outlined in his article, a short list of 23 things to keep in mind while trying to write good fiction.
I know, I'll be going back to this article on a regular basis!