Trafficking

After all that I like to present my blog to blog directory I wonder why I still have no traffic. How often should I send my blog? I will submit it to a social bookmarking every time I post a new article. When I have a job to a social bookmarking, is this the right way to present the article at a time? My articles have been submitted to Digg and reprint too. With Digg, I came to know that my article has received a low response rate. Why is that? In your opinion, what are the mistakes I made?