And here is 10 tips from WebProNews on building successful G+Pages:
1. Engage, engage, engage
2. Hangouts are awesome!
3. Manage your Circles
4.You can +1 a Page to show support or add them to your Circles.
5. No Google+ Page can follow you until you follow them.
6. Google+ Pages can’t even mention you unless you’re connected. “No +mention spam.”
7. Google+ Pages automatically unfollow you if you unfollow them.
8. You can find Google+ pages in Google Search
9. Pay attention and responded accordingly.
10. Connect your Google+ Page to your AdWords campaigns.
the full article is at http://gay.gl/hc