You want to attract visitors to your site. Tap into their needs, look at the Web from their point of view. The Web is used in many ways, for many purposes, by many people. In essence though, most these differing uses can be reduced to just two. It is a simple, but powerful fact.
Many people use the Web as though it was a huge encyclopedia.
In many ways it is exactly that. You can use this quest for information to your advantage. Make your site interesting and informative. Don't just try to peddle your message. People want more than that.