Good question. I've only just started to try and follow the more relevant people in the industry. At the time being, I've just followed a couple people that have had good blog posts I've seen posted on HN. That mixed in with a couple of my personal favorites:

kevinrose cyanogen marcoarment

But I've also moved a bunch of people I follow over to my G+ following account. It's just a much better format, and the content is pretty much the same. And threading is much nicer (@replies drive me crazy).