Duotrope — A resource for writers that offers a searchable database for current writing, submission trackers, and useful statistics.
All You Need to Know About Publishing in Online Lit Mags — The article title says it; a deeply informative article.
Print Magazines Taking Online Submissions — EveryWritersResource.com has a list of magazines that take online submissions.
Tell It Slant – Journals — A collection of literary journals for writers to submit their creative manuscripts.
Top 50 Literary Magazines — “A list to help writers find a place to publish their writing that will get them some recognition.”
Butterick’s Practical Typography — Why typography matters, and how to practice good typography.
Tools for Writers — Writing prompts, exercises, book review outlets, guides to getting an agent, and much more.
The Ultimate Guide to Twitter for Writers — A comprehensive guide to the what, how, and why of Twitter for authors.
The Ultimate Social Media Guide for Writers — A good introductory read for those new to social media, and good for anyone who needs a refresher on successful social media practices.