One great way to get short stories noticed is to enter contests (but only if you don't have to pay an entry fee). You can then parlay that into content on a blog, or link it to facebook or simply use it on your resume. Then, when you send a short story somewhere, you can mention that you were published in this or that site. Also, there are a number of small presses--Pill Hill Press is one--that offer themed anthologies the year round. The pay is pretty awful (what they call "semi-pro" rates) but the anthologies are released in print. Also, there are unpaid sites for crime fiction/pulp fiction that are very well respected, like A Twist of Noir and Beat to a Pulp (BTAP). There's a woman named Abra Staffin Wiebe who has an extensive marketing list available free that covers SF/speculative and fantasy. Some of the markets she lists pay in the $100 plus range.