Editors are people who are flooded with paper. Mail out five book or article queries at a time, in batches. You could grow old and die by sending out one book proposal at a time and waiting for a publisher to accept or reject it. This organization holds conferences, offers correspondence courses, tapes, and editing services. Their newsletter is informative, practical and uplifting.
Less space is given to industry trends, more to how-to's and encouragement.
For most new writers, I recommend first trying to get your book published via established publishers. The wonderful thing about this site is that they offer online help with questions about agents, book contracts, etc. Updated daily, this website encourages writers to be salt and light in the secular world. He's a wonderful guy, easy-going and brilliant at the same time. As a top New York agent, this guy knows his stuff.