If you're looking for a source of short stories or articles to meet your 42 SF Challenge goal, check out Galaxy's Edge Magazine. Published six times a year, the magazine is available in paper/printed and electronic editions. Also, the current issue can be read online for free.
The November 2014 issue contains short fiction by Leena Likitalo, Robert Silverberg, Jack McDevitt, Lou J. Berger, and others. You can read an interview with Eric Flint and columns by Barry Malzbert and Greg Benford. And if that weren't enough, there are book reviews by Paul Cook.
Past issues are also available for purchase.