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Google Plus Guides for Brand Pages
Complete Guide to Optimizing Your Google+ Brand Page (featured by Guy Kawasaki in his “Mega-list of how-to guides for Google+ brand pages” )
Also see: My monthly column on Google+ for Business at Windmill Networking. (Tips on effective methods for your business page to help your business grow.)
Google Plus Guides for Authorship & SEO
Read This First! Google+ SEO: Everybody Talks About It – How Do You DO It?
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!)
General Google Plus Tips and Tricks
Useful Google+ Tips by Mark Traphagen Elsewhere on the Web