Short story market
When I was a young(er) writer, beginning to submit to the world of literary magazines, I had little guidance and few tools. Sure, there was Writer's Market, but it cost about $25 and its listings didn't always give a true sense of what types of fiction the magazines were seeking. The tubes of the Internet have made the game a lot easier, now that many mags have samples of stories online. There's nothing like reading a sample of published fiction to give you a sense of what the editors like.
I used to laugh when, in the submission guidelines, magazines would urge you to buy a sample copy. I understand the idea: it gives the writer a true sense of the publication and literary magazines die without monetary support but often new writers can hardly afford to buy a copy of every mag they might be interested in sending a story to. Hell, I remember that the postage costs for sending out stories and entering a few contests made a dent in my small checking account. A dent that doesn't bounce back when your story finally is accepted by a magazine, because the magazines I've been published in (thus far) paid me in copies.
So the Internets have made searching easier, as has Duotrope's Digest, a
site that allows you to search magazines by story length, payscale, and genre. They even allow you to exclude from your search magazines that are not currently accepting submissions. It is super useful. Go visit.
Another unexpected tool I learned to use in my Grub class taught by Ellen Litman are collections of best short stories such as the O'Henry or the Best American (if you're sending off to mainly US magazines). Often a magazine may have one or more stories represented in the collection which shows you: hey! good magazine! and what they've published in the past.
And talk to other writers. You may find out the widely respected Magazine X is notoriously late in response time though they demand your submission be exclusive. (Exclusives suck). Or you might discover that the editors of Magazine Y really dig your current fiction motif of animal chefs. Who knows?