Sites like digg.com, reddit.com, stumbleupon.com etc can bring you a LOT of traffic. How about getting 20,000 and more visitors a day when your listing hits the front page?
Getting to the front page of these sites is not as difficult as it seems. I have been successful with digg and del.icio.us (and not so much with Reddit though the same steps should apply to it as well) multiple times and have thus compiled a list of steps that have helped me succeed: Read more »