Free Downloads from Your Web Site
Give your audience something useful that they can use, but also make it unique and interesting enough that they'll want to download it. My brainchild of an idea was http://www.funcalculator.com. On this site, you can download for free a fully functional calculator that either farts or makes sexy sounds. It's amazing how much interest this site has generated. In its first week, we had over 20,000 downloads. On the site, we included a Send to a Friend button that allows the user to tell his friends about what the site has to offer.
The original concept for this came from my other Web site, http://www.spazco.com, where it generated tons of press. In fact, the calculator was on Tech TV four times this year and won a slew of site awards for its creative and interactive design. Never underestimate the power of a fart.