If you're a writer looking for concrete advice about the publishing world, check out Nathan Bransford's blog. As a writer and former literary agent, he has lots of good advice, and a funny, user-friendly way of presenting it. The whole blog is interesting, but pay special attention to the "Publishing Essentials" sidebar, where he links to his posts dedicated to writing query letters, formatting your manuscript, crafting a synopsis, writing query letters, writing query letters, and writing query letters. In case you didn't get my rather subtle hint, I think query letters are a nightmare. This site takes away part of the mystique.