A lot of successful websites depend on returning visitors to account for a major part of their traffic. Returning visitors are easier to convert into paying customers because the more often they return to a site, the more trust they have in that site. The credibility issue just melts away. Hence, keep your visitors coming back to your site with the following methods:
1) Start a forum, chatroom or shoutbox
When you start a forum, chatroom or shoutbox, you are providing your visitors a place to voice their opinions and interact with their peers — all of them are visitors of your site. As conversations build up, a sense of community will also follow and your visitors will come back to your site almost religiously every day.
2) Start a web log (blog)
Keep an online journal, or more commonly known as a blog, on your site and keep it updated with latest news about yourself. Human beings are curious creatures and they will keep their eyes glued to the monitor if you post fresh news frequently. You will also build up your credibility as you are proving to them that there is also a real life person behind the website.
3) Carry out polls or surveys