Consider that this concept is a true art form and no one has completely mastered it, so you have a serious chance of doing a better job than someone who may be competing for your visitors with similar information. Secondly, because people have a short attention span they are not inclined to do anything for too long, or to come back and do the same thing over and over. At least in most respects. You can address this effectively by changing the material on your pages regularly. You can also do this by adding new material regularly.
People often enjoy shapes, colors and sounds, too.
You may want to incorporate these elements into your creations. Consider that each of them caters to a specific sense that not all Internet visitors share in common, so you want to include a wide breadth of sensory input wherever possible. Try not to rely on one sense. While the Internet has traditionally catered to the sighted for example, many blind users of the Internet have diverse interests that you may share with them. The same holds true for differing ethnicity's, races, and nationalities, to name only a few.