Lots of fabulous ideas in this thread. Are you active on any social networks? If so, make sure you're letting your communities know you have a new blog and share your relevant blog posts with them. Are you active in any LinkedIn groups that are related to post-secondary education? If not, find and join 2-3 and participate. Ask and answer questions to get known. Also share your blog posts in your LI status updates. That will bring some visibility too. Do some research on Google+ to find communities discussing your topic. Join and participate.

Remember blogging and building a devoted readership is a marathon, not a sprint. Good luck!