I have only recently started submitting my short stories for publication in a systematic way, and yesterday I found this great website (that you probably already know about, but I'm going to share it anyway): duotrope.
It lets you search for suitable lit mags with all sorts of different criteria (like acceptance ratio…whether they pay…how long your story/poem/whatever is), and you can track your submissions. I am still using my little excel spreadsheet that I made a few months ago for that, but anyway, it's pretty awesome.
It's like the Novel and Short Story Writer's Market, but less professional, and a lot more…desperate, I think is the word I'm looking for.
Edit: well, the link is working now. I need to stop throwing up posts in a hurry.