Robin Good: If you have decided to move on to Google+ ground and start doing something serious about it, I wouldn't hesitate one second in recommending this truly thorough guide on setting up an effective marketing strategy via Google+.
Neil Patel at Search Engine Journal covers it all. From how to optimize your Google+ Profile and Circles to how to format your Google+ post and headlines, he does a thorough job of summarizing and explaining clearly what you need to do to make Google+ work for you.
Very useful. 9/10
Via Robin Good, Antonino Militello