Now that I've skipped over to Jeff Fisher's blog, I note he's referenced a publication, Graphic Design:USA, that comes free to design pros.
After looking over the web page, I can see there's quite a bit of good stuff there that more than justifies the price (did I mention it's free?).
Design periodicals keep us connected to trends and to what's important. Also, they're just plain fun to read. Surf on over to GD:USA and grab you a free sub if you're kickin' it pro-style. Go!