On Saturday I schlepped through the rain along with 25 other writers, to get advice from the director of the writing program at Manhattanville College.
Along with some good old encouragement ("persistance is nine-tenths of acceptance; publishing is a numbers game"), she suggested a few resources that she and her writing students have found helpful. And nope, it's not the standard suggestion of the Writer's Market!:
Little Magazines and Small Presses - the "Writer's Market" for literary magazines and small publications...although many of these markets don't pay.
Mediabistro - magazines list job opening here, and I've been told that for an annual fee, the site also provide up-to-date writer's guidelines and market needs, straight from the editors' mouths. I haven't found this particular service yet-
And for fiction writers, a few great short story collections:
The Pushcart Prize compilation
The O. Henry Prize Stories
For writers in general:
Brenda Ueland's If You Want to Write