Very well-known, but Seth always leads me to think a second time: Seth Godin’s blog
I once saw Ian in a conference; disruptive, unexpected, fascinating: Ian Pearson’s Futurizon blog
Francis Pisani’s blog; rich, concise, straight to the point: Winch 5 by Francis Pisani
Jake Pierce wants to ensure innovation is not a failure; blatant, you say? Jake Pierce’s website
Data Elicitation 