Have you tried to write something controversial, that you know would split people's opinions? Something that causes a debate, like pros & cons of vegan diet and it's effects on the body (just an example). Then submit it to Reddit. Let people argue with each other, this will make the post hot and it will end up on people's facebook walls, twitter, and elsewhere.
From then on make sure to write quality content so people will come back often as they have already visited your blog once.