Chris Abraham wrote a piece last week, Max SEO with 8 simple Google+ steps before Google opened up G+ Brand Pages, so first go read what he wrote in the previous post(because all of the advice still applies).
I selected this piece because it's information you need to know to put your stake in the ground on Google+:
In this post, we'll work on setting up your brand page right away in the right way. If you follow these steps, you'll be as well-placed as possible.
**First, did you notice that there's a new button on your Google+ profile? Go ahead and click "Create a Google+ page" and we'll get started.
Your first option is to create a page. Be careful here, because it isn't simple to change the sort of page you have.
Selected by Jan Gordon covering "Google+ Watch"
Read full article here: [http://www.socialmedia.biz/2011/11/16/set-up-your-google-brand-page-right/]