So, for some this might be old news, but for others it could really help with getting real, organic reviews. What you want to do is grab your G+ URL and at the end of the URL add ?hl=en&review=1 When clicked, this automatically loads the form for the user to input their review. Email satisfied customers or customers that you have a good relationship with and add a link to your G+ profile with the added ?hl=en&review=1 at the end. Here is an example of what your URL should look like: plus.google.com/yourbusinessname/about?hl=en&review=1 or plus.google.com/yourbusinessname/posts?hl=en&review=1 Hope this helps. Now reach out to your customers and get those reviews! It will help a lot with local rankings.
Try to write a useful article about your company. Then big portals, such as http://www.bbc.com/ can repost your note and huge people will find out your company and write reviews.