So, of the few TILFs I've actually done, two have been about magazines, which would make it seem like I have a short attention span. BUT - Cabinet is amazing, and it's been absolutely consuming my life in the best way for the last few weeks.
It's a quarterly from Brooklyn, and is so engrossing to read. Their stories cover a huge range, and it's the kind of magazine you'd read cover-to-cover, simply because everything is fascinating; even if you didn't think it would be. In the last couple of days, I've read stories about amatuer spectroscopy, a history of fire-escapes, plaice, Pampas architecture, strange attractors (!), and an account of how Soviet nuclear tests were detected by a cautious US. Seriously.
The writing is so engaging. Also, each edition comes with a postcard and a bookmark. Check out your local library.