Its great to get a free listing I am on a few,here is one that has heaps of info on lots of different areas pertaining  to photography.

http://www.photographers.com.au/emmaturnerphotography

I recently did what they asked and submitted four clients email addresses to get more good reviews.A couple have reviewed my business and a couple haven’t as yet but I know they were very happy with their session ,one has booked again.Do I ring them and ask if they heard from the company or just leave it ? Naturally you can pay for premium listings not sure if they work or not .At the end of the day I am beginning to believe Google is the only way to go when it comes to paying to get more business to your website .