Erica Verrillo has written seven books and published five. She doesn't know why anyone with an ounce of self-preservation would ever want to publish. But, if you insist on selling your soul to the devil, learn how to do it right: marketing, literary agents, book promotion, editing, pitching your book, how to get reviews, and ... most important of all ... everything she did wrong.
I post upcoming calls for submissions shortly before the first day of every month. But as I am collecting them, I post them on my page, Calls for Submissions . You can get a jump on next month's calls for submissions by checking that page periodically throughout the month. (I only post paying markets.) Also see Paying Markets for hundreds of paying markets arranged by form and genre.
Happy submitting!