Hi Matt -

Please use Facebook Groups, Linkedin, Pinterest, Quora, Twitter, Reddit, Flipboard, Stumbledupon, Instagram and G+ as they are the best that I have found

Hi Matt, well, the way that I personally did it was just by creating a lot of content and bringing people in naturally through SEO techniques that you learn at WA. However, this can take many months before your site starts bringing in reasonable organic traffic.
So, you can try and boost this by other means - such as setting up social media profiles and sharing there, using hashtags for example and building a following. I personally find Pinterest pretty good at this point and am trying to build my Pinterest account at the moment.
You can post on question/answer sites, such as Quora an link back to relevant content on your blog. You could start a YouTube channel, create relevant videos connected to your niche and link back to your site. Those are a few ways -- a majority of my traffic is simply organic from the search engines. But you can speed things up via some of these ways and I'm sure other people have some ideas here too. Nat