Google Plus Guides
UPDATED July 2013! By popular request, here are all our “how to” Google Plus guides for using Google+ effectively, whether for business or personal use, in one convenient listing.
Google Plus Guides for Brand Pages
Google Plus Guides for Authorship & SEO
How Google Plus Profiles & Pages Gain Search Authority (on Search Engine Land)
How to Show Your Google+ Profile Photo in Google Search Results (setting up rel=author Google Authorship)
Verifying Google Authorship for the Paranoid (How to Make Really, Really Sure You’ve Got It!)