Here are two sites you should definitely check:
CRWROPPS: I can never remember what the letters stand for, but it's worth subscribing to their email information. You will hear from them almost daily, with news of writing contests, writers' positions, magazines, chapbook publishers, etc. seeking submissions.
Pixelhose: This is new for me, but a writing friend entered one of their contests, which are judged by readers along with their staff. You get emails with the finalists' entries and can "like" them if you choose. Sounds worthwhile.
Any other great sites you'd like to mention? If so,