By the way back to the main topic here. The best place to promote your blog is in social networking sites, mainly like in facebook, tweeter, and google+. There are a lot but these three are the most effective social networks to promote any content you want. And to do this you might just share it your friends, facebook pages and groups or make a page for your blog and let people like it. Just remember a single is very important when it comes to facebook promotion for your blog, Just think for this if a person likes a page that link will be shown to all his/her friends so it is so viral should I say.
You can also create social profiles on different social networks and add a link for your blog then share them of course. Social networks have high and almost perfect ranking in google or i'll just say page rank, and as we know if your blog has a link on a website with a high page rank some of the "juice" as many call it will be passed to your blog. Facebook's page rank is 9 so facebook linking to your blog will give you much benefit already, but don't forget about other social networks also and not just social networks research for high pr websites and find your way to add your link to their site.