I have a couple sites that I will post on when I'm trying to show people an article that I just wrote. I use Twitter, Tumblr, Reddit, and Googleplus. I'm not sure how much traffic that I get from it, but those are some of the ones that I use. I think that the best thing you can do if you're trying to get your work out there is to just throw it up on any social media site that you have. Even if you join other sites in the process then even more people will see it. The site that I post on will give me a list of sites that I can post onto from there, so I think that helps me. I just showing what you did on all social media sites that you are on will work. Also, if you can post as a visitor on sites, that will help too.