We are just about to launch an online marketplace with a focus on waterfront lifestyle living.
There are lot of options. I've seen some people swear by Reddit and other social media. I've never been able to crack that nut. I use blogging on my site and guest blogging on other sites. Other sites will typically let you post 2 links to your website in the article. If your passionate about your industry it's easy to write 500 words on a topic.