When You're Looking For A Fresh Feel From The Waves Of Salt Or Freshwater, It's Always A Good Idea To Take Some Time To Swim In Another Pond. Here Are Several To Get You Started.
Horror Writing Associationhttp://horror.org/ This is a terrific organization of professional writers. They offer many programs that help horror writers. They even have a “mentoring” program for young writers. If you write horror you should be a member.
Science Fiction and Fantasy Writers Association of Americahttp://www.sfwa.org/ This organization has members who give great advice to one another. They have very good resources for Science Fiction and Fantasy. Please take a look at their Why Join SFWA. http://www.sfwa.org/2010/10/why-join-sfwa/
Society of Children’s Book Writers and Illustratorshttp://www.scbwi.org/ This organization is very good at helping Children’s authors navigate the world of publishing. They offer grants and other programs for writers.
The Author’s Guildhttp://www.authorsguild.org/ You must be a published writer to join, but members enjoy many perks. They even have free contract review! Take a look.
American Society of Journalists and Authorshttp://www.asja.org/index.php These guys deal with non-fiction writers. This is a very lonely section of the writers population. Non-fiction writers and journalist can enjoy many benefits of this society. Take a look at their Why Join ASJA page.
Romance Writers of Americahttp://www.rwa.org/ Lonely Romance writers can find companionship on this site. They even have an online community. Check out their services.
The National Writers Unionhttp://www.nwu.org/ This group is for freelance writers. Check out their Members Benefits page.
The International Women’s Guild http://www.iwwg.org/ Here is a writing guild specifically built for women writers. Take look at what they offer.
National Novel Writing Monthhttp://www.nanowrimo.org/ This is different than the other organizations on the list. It is a group of writers, but they have a single goal. Every November (national novel writing month) they push their members to write a novel. If you write fiction, this can be a great thrill to try to push yourself as much as you can to write something great in only a month. Check them out.