Reply to other blogs
There are probably hundreds (if not thousands) of other blogs about the same topic which you can find through services like Technorati. Let them know you exist by replying to their posts (with your link). Try to actually write meaningful replies, the chance of someone clicking your link are a lot bigger if they are triggered by your reply. Don’t care to much if a blog adds “nofollow” to a link, if your reply was good enough the author might link to you in future postings.
