New Scientist and National Geographic seem to go together for a lot of people, and I read them both too. I have become a little bored of NG though, the articles always seem to be written in the same style.

Photography wise, I'll occasionally buy something if it looks to have a couple of interesting articles. I read Amateur Photography most weeks for free, in my local library. It's not something I'd buy every week, but I do enjoy reading it (and looking at the photos).