I can't believe I've only just started buying these excellent magazines. Asimov's Science Fiction is a monthly that publishes short stories, novellas, novelletes, poetry and editorials. Science fiction great, Isaac Asimov, the author of I-Robot and the Foundation series, was the magazine's editorial director from its inception in 1977 to his death in 1992. Over the years, the stories from Asimov's have won 44 Hugo Awards and 25 Nebula Awards. The price is low and if you are into science fiction you will find a comfortable home here with many of the world's best authors. The 30th Anniversary issue is out now and it is fantastic. I've got a copy right next to me as I write this and I am currently reading a novella by Allen M. Steele called The River Horses.
The magazine has a website that is not very attractive but it has all the information you need to subscribe or just find out what's inside the pages. You can find Asimov's at most newsstands and book stores.
Go the Asimov's website