I normally share interesting blog-posts simply by sharing them from google reader. See the box on the right of the main page of this blog.
Scienceblogs is a wonderful site with blogs about...science (mostly), but unfortunately there are simply too many post that I want to have them in my reader. So I can't share them the usual way.
So here is an interesting post about SAD - "winter depression".
And here is one about blogging being good for people