Web 2.0
Web 2.0 - blogs, user generated content, online forums, quizzes, games, content syndication and a host of other tactics can be extremely helpful in driving traffic to your site. They can also be very effective at engaging visitors once they actually reach you.
Forums for example can encourage people to return to your site, blogs can provide topical commentary that people are likely to search for and user generated content not only provides additional indexable content for your site but also can use terminology and language that you perhaps didn't appreciate your audience might use providing an additional way for people to find you.
