I have a review blog in a sub niche of weight loss and I've been manually trying to post on forums, blogs, and news sites to promote it, but it's not working. My comments are good and don't look like spam, but some still get deleted. I have been using my signature in forums as well. None of my efforts have led to any conversions. I don't know anything about SEO, but I've been trying to submit my site to blog directories to rank for a keyword. Could I actually hire an SEO expert on oDesk to rank my site? Would that work and lead to some sales?