https://plus.google.com/authorship
Link your Google+ profile to the content you create as author. Thus creating social links that can be trusted…
http://www.seomoz.org/blog/authorship-google-plus-link-building
Related readings :
Google+ Shows How your Website is Performing in Google Search Results
How to fix “missing required fields” warnings in Rich Snippets Testing Tool
http://support.google.com/webmasters/bin/answer.py?hl=en&answer=146897