Commenting on other blogs can get you some traffic but this can only work if your comment and any link you provide will be relevant or intriguing enough to get someone reading the comment want to know more about you. Use blog directories to find blogs which are similar to yours, subscribe so you can get their RSS feeds. When these blogs are updated, you'll know it and if they post content which you think what you've posted on your blog can supplement, head over and write a comment. If they allow links, you can link back to your site. Do this often and see your traffic consistently grow.