Mashable I would advise against. It's full of fluff articles, and sometime a year or two ago had the inexplicable idea of turning into a social network itself. It's a mess of a site and its writing is no better.

Though I don't follow many blogs anymore, period, R/WW writes fewer articles, but it tends to do a much better job with making sure the articles it DOES write are good. It's fairly high-quality.