What counts as “previously published”?  This article from Writer’s Digest magazine pertains to poetry in particular, but it is very helpful to all writers regarding the definition of “pre-published.”

Starting and maintaining a writing group — Good advice and planning ideas from the Writing Center at the University of North Carolina.

Midwest Independent Booksellers Association
A nonprofit trade association that supports the success and growth of independent bookstores in Illinois, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, South Dakota, Wisconsin, and Michigan’s Upper Peninsula. Interactive map and information on events, programs, and independent publishers.

Predators and Editors: A free online site devoted to sharing resources for writers of all persuasions: fiction, nonfiction, poetry, screenwriting, etc. It offers lists of publishers (with notes of good or bad reputations), magazine publishers, contests, conferences, lists of other sites with advice and help for writers, and lots more.

 The Write Life  The 100 Best Websites for Writers

Grammar Girl: “Your friendly guide to the world of grammar, punctuation, usage, and fun developments in the English language.” (Use the search box to find answers to your questions.)

Advice on aspects of creative writing — Fiction Writers’ Mentor

Literary Magazines that Pay $$   by Betty Tuch, founding editor of The Review Review

Tax Advice for Writers from Writer’s Digest

Tax Tips from Writer’s Digest (podcast)

Writers and Editors  — A wealth of information for writers: everything from style guides to publishing to talking about your book on the radio.

WritersWeekly.com features articles on numerous writing topics, including: paying markets, warnings about publishing/publishers, promoting your work, etc. Writers Weekly is part of the BookLocker.com, Inc. family of businesses, which includes POD and ebook publisherBookLocker.com, Abuzz Press and Pub Preppers.