SF (and fiction) basics, books online
The author of this Battlestar Galactica novelization, Jeffrey A. Carver, has a Web site with great advice on getting over basic missteps in any kind of writing, as well as the specifics of creating an entertaining SF world.
Writing Science Fiction and Fantasy
And don't forget to download your free books. Tor is ending the program, which probably rattled some cages in sales for this Macmillan imprint, on Sunday. Maybe most important is what Tor is doing now: putting everything it sells in electronic format, if the big publisher has online rights.
Tor's Patrick Nielsen Hayden notes: "Tor parent company Macmillan is actively converting all titles to which we have digital rights. It really is just a matter of time before the majority of our library is available in e-book form.... There are issues of workflow and rights, just as there are everywhere else. I think you'll see lots more e-books in lots more formats in the next few months."