Increasing traffic involves advertisment too, you can do it for free if you're willing to put in the time and energy. I am a frequent poster on a forum based on the niche I blog about, I make multiple posts each day but never saying "Visit My Site"...instead I just help answer questions to the best of my knowledge and have my blog link in my signature. It's probably not the greatest traffic grabber, but it brings me steady traffic daily. Any way to get your blog out to people looking for information will help.