Resources for Google+ Business Pages
Many brilliant folks have provided articles to teach youhow to do everything from adding business pages to building your brand and working on Google Authorship. Here is a great list of resources for you to enjoy.
This is Google's Own Instruction page:
Learn from the Best
Here are some wonderful instruction guides by an expert, Mark Traphagen, of Virante Search Marketing. His guides are well known and trusted.
Owners manual of your Google Plus Page
How to Optimize Your Google Plus Brand Page
The Google+ Resource for Setting up Authorship:
Google Plus Authorship Instruction page