The first that needs to be remembered is that it is easier to attract the new visitor on the website, than to hold on it old. Therefore to attract users on the website not the most important, it is important to hold already available. It is necessary at least for the reason that to attract new users more expensive.
So, with what to begin. The most important that needs to be made for involvement of visitors, it constantly to update text and graphic content of the website. Nobody will come to your website only because you spent for it a large number of money, it is necessary to remember it especially as if the website is very mediocre. Using a large amount of the graphic information, you create ideal conditions for interest of potential visitors.
Think of convenience of the website, enter it as the user and try to find the necessary information, to get access to some data. Do you consider that everything is very simple? Your website means will make success at visitors. Now nobody reads long ordinary articles, nobody waits for many seconds to download any given file. Clearness and laconicism should be your rule. You do not stint high-quality programming, by means of it you will create the base for successful business.
For additional involvement of people it is possible to use address, the newsletter. Sending interesting information on mail, to you for certain "will come on a spark". An effective method of involvement of users is direct advertizing in search engines, for example, Yandex.Direct or the Runner in Rambler.
One more key to success, is personalisation. Allow the user to create the world or the blog on the website. Of course, most of people do not love registration, but let's look at it on the other hand. Offer the registered visitors something interesting, exclusive content, good speed of downloading and other. Thus, you will manage not only to attract users on the website, but also to provide with them ideal feedback that will help to hold them.