1) make sure to have a science section in my Google News set-up, and additionally use Google News and Google Scholar keyword searches to check submissions by other users to HN,
2) follow the recommendations of certain key Facebook friends of mine who are either professional scientists, science writers, or science educators,
3) daily read Science-Based Medicine
http://www.sciencebasedmedicine.org/
(I don't submit to HN from Science-Based Medicine every day, but I have found some GREAT articles there over the years)
4) daily read Why Evolution Is True
http://whyevolutionistrue.wordpress.com/
(which sometimes has personal posts by the site owner but also has EXCELLENT posts by him and by guest posters on cutting-edge science issues, some of which I post directly and some of which lead to professional journal articles I post directly)
5) daily read Skeptic Blog http://www.skepticblog.org/
(which goes from very ordinary to EXCELLENT in quality in unpredictable fashion, and has several very thoughtful co-bloggers contributing)
6) daily read Respectful Insolence
http://scienceblogs.com/insolence/
(which has had some EXCELLENT posts about the methods of research over the years)
7) receive specific suggestions of research articles to read on human intelligence and human behavioral genetics either by request or by researcher nomination from the Minnesota Twin Family Study researchers with whom I discuss issues in a journal club during the school year
8) occasionally look at Pharyngula
http://freethoughtblogs.com/pharyngula/
(which went through a bad dry spell while its author finished writing his book, but which now occasionally has some great posts on topics of much interest to HN participants)
and
9) generally prowl the Web and recommendations I see anywhere else in cyberspace for good articles on science. I test most articles I see submitted anywhere with the checklist from Peter Norvig (Google's director of research)'s article "Warning Signs in Experimental Design and Interpretation,"
http://norvig.com/experiment-design.html
which is my all-time favorite link to share in discussions on Hacker News.
if i find myself going to the same site from an aggregate often, i'll add that to my daily morning news blitz before i get to work, but there are SO many news websites / blogs, i stick to my list and follow the links if a headline catches my attention.
Also: NYT daily email, read articles without subscribing.
Counterparties: http://counterparties.com/