If you've joined a lot of Google+ communities looking for opportunities for discussion and to meet new people, you're likely a member of at least a few communities that either aren't active, or are not providing you with the valuable discussion you were looking for.
One of the interesting features of Google+ is the Explore button. Clicking it reveals "What's hot and recommended" on Google+ (it used to be called "Hot on Google"). These are the posts that are trending, and in fact, to the right of your stream you will see a list of the Google+ hashtags and conversations that are literally trending. You can check out this feed any time you want, and control how many of these items get into your Home stream.
If you aren't yet using Google+, or aren't logging in regularly, the social network may seem a bit intimidating. It's different from Facebook in a lot of ways, and there are a number of features and nuances that may not be obvious how to use or what you're supposed to do. These are perfectly understandable stumbling blocks to using and getting value out of Google+.
Many businesses and organizations regularly plan and promote events. Traditionally, you might have mailed invitations, published an ad in your local newspaper or trade magazines, or perhaps even advertised on TV and radio. Particularly if you're limited in your marketing budget, Social Media represents a tremendously effective and inexpensive way to get the word out about what you're doing.
While I do not recommend trying to fully automate all of your social media activity, as that defeats the purpose of social networking, I do recommend that businesses with an active blog find a way to re-post old blog entries. Re-posting blog entries is great for reminding your followers on great points you've made, as well as sharing that content with new followers who might not have seen the post the first time around.
Learn when the best (and worst) times to post to social media are, why it matters, and how to optimize for your business.