Last update 25 January 2013.

Writing Erotica, tips and techniques
About Writing Erotic Short Fiction.
Writing (Erotic) Short Fiction – FAQ.
Five Tips for Writing Erotica.
Making it Good.
Making Stories Stand Out.
Writing Explicitly.
Realism in Fantasy (Sex), guest post by Cecilia Tan.
Author Resources and Calls for Submissions at erotica-readers.com.

Writing, Generally and Specifically
How to Learn to Write.
How To Write A Novel (in 72 easy steps!).
Short Fiction FAQ.
On opening sentences.
Some Practical Worldbuilding Techniques.
Making the Paranormal Real: Boundaries and Consequences.
Some Notes on Revising a Novel.
Writing Historical Detail.
Dialogue Tricks.
Size Does Matter.
Reading for the Writer.
Paragraphing.
Breaking Chapters.
Tell Not Show.
Myers-Briggs Characterization.
Building Setting: Inherent Conflict.
Active Settings.
Descriptive Worldbuilding.
Hooks and Anchors.
Kinesics in Fiction.
Three essays about paranormal romance/erotica.
Pithy Writing Advice.
All my posts on the craft of writing.
Books on Writing.
The Official Real Writer Certificate courtesy of author Janni Simner.

Books About Writing:
Style: Lessons in Clarity and Grace (10th Edition) by Joseph M. Williams.
How to Write a Sentence: And How to Read One by Stanley Eugene Fish.
The 10% Solution by Ken Rand.
The Art of Time in Fiction: As Long as It Takes by Joan Silber.
Steering the Craft: Exercises and Discussions on Story Writing for the Lone Navigator or the Mutinous Crew by Ursula K. LeGuin.
About Writing: Seven Essays, Four Letters, & Five Interviews by Samuel R. Delany.
Take Joy: A Writer’s Guide to Loving the Craft by Jane Yolen.
Storyteller: Writing Lessons and More from 27 Years of the Clarion Writers’ Workshop by Kate Wilhelm.

External Links:
Writer Beware.
Preditors and Editors.
The Business Rusch, up-to-date publishing news from Kristine Kathryn Rusch.
25 Hard Truths about Writing and Publishing at Chuck Wendig’s blog.
The Science Fiction & Fantasy Writers of America.
C.J. Cherryh’s “Writerisms and Other Sins”.
Word frequency counter at Write Words.
Glossary of English Grammar Terms.
Timelines! Of! History!
The 1911 Encylopedia Brittanica, especially great if you’re writing historicals.
The Perseus Digital Library at Tufts University.
The Virtual Reference Desk.
Medieval Names Archive.
Etymology and History of First Names.
Visual Thesaurus.
World Wide Words, Michael Quinion writes on international English from a British Viewpoint.
International Dialects of English Archive, with audio.

Research and Recommendations:
My favorite romance books and research books on World War One.

LibraryThing for Victoria Janssen. My WWI research library is listed in its own collection.