Some sites are more valuable then others, especially for beginners. The type of site you frequent is often determined by the sort of writing you wish to do. For fiction, try Coffeehouse 4 Writers . For nonfiction, Inkspot has excellent information. If you wish to write for the homeschooling market there is even a website, Teraisa's Homeschooling Page , devoted to helping you do just that.
Good sites change their content on a regular basis and have frequent visitors.
Many reputable websites are offering online writing classes. I have heard wonderful things from the classes offered by Writer's Digest and Coffeehouse for Writers . The instructors are generally knowledgeable and the prices reasonable. Not only can these courses help you grow as a writer, but they can be a wonderful way to learn if you have children who also like to write. Just as lists and websites have sprung up from nowhere, so have writers e-zines and newsletters.