I try to stay up-to-date on some technical subjects. These sites are going to give you an idea about my interests and they materialize in my blog posts.
1. slashdot.org: by far this is my favorite tech story-posting website that I've been following since ~2000. It has survived digg, reddit, twitter, et al. You come here for the amazing discussion. It has a superior comment moderation system that is freely available but no one uses it!
2. Data Science Central I have some issues with the quality of the content here but it's still possible to learn something nonetheless.
3. Data Community DC. Since I'm in the DC area, I like to see what goes on locally.
4. Whatever is on twitter: raw and unfiltered.