Michael Gray from Wolf Howl had an interesting post about what time of day do you post to your blog. One thing that I like to keep in mind when posting is that readers probably have hundreds of options in their feed reader, but the amount of blog posts in their reader decreases over weekends drastically. So if you start posting on the weekends, there is a good chance that you will start gaining new readers because when they can’t find anything else that’s interesting to read they will at least be able to read your blog post.
Keep your posting schedule the same for a few weeks but also start posting on the weekends. Do this for a month and you should see good growth from it.