My current subscription list includes;
Wired -- has slipped a bit, I worry they have lost the will to cover cutting edge.
Smithsonian -- a wide variety of topics, some tech, some archeologh etc.
Smithsonian Air & Space -- (now quarterly :-() which has good space technology as well as interesting stories of both military and civilian aircraft.
Science News -- which culls from a lot of journals and finds interesting papers to highlight (I will often follow up on an article by writing to the researchers for copies of their papers)
Popular Science, Popular Mechanics -- These have become remarkably similar in their content focus, that said they keep me up to date on a lot of commercial gizmos that I might otherwise miss in the noise.
QST (part of the ARRL membership) -- Which is all about Amateur Radio and so it hits a lot of interesting topics as I continue to explore software defined radios both in theory and in practice.
I use Scansnap scanner and paper guillotine to save articles that I find either particularly interesting, or I am curious if they will go anywhere. There are many interesting "over night" revolutions that appear years earlier as some sort of "wouldn't it be cool if ..." article. Indexing them is a pain, my indexing foo is weak :-).