Just tweet everyday with your services/product promotion and always request other member to join your community.
Tweeting everyday may be of some more help in getting visitors. further one also needs to number of followers- and if they are choses properly- having interest in your own site or blog subject, there is possibility of more clicks through twitter.
use twitter regularly. its the only. keep twitting regularly about your sites. new products, new content, any think. make the people think that your site is regularly updated with quality contents. it will be enough to see a good result in a few days. thanks