Its hard to give some solid advice without knowing what these sites are about. It could just be the nature of the service, or maybe you just need something extr

Its hard to give some solid advice without knowing what these sites are about. It could just be the nature of the service, or maybe you just need something extra to encourage them to explore more and fully understand the value you're providing. This is basically a shameless plug, but I'd love to talk to you about your sites and see if we can work together. My startup is IActionable.com and we offer Gamification/Game Mechanics as a service which I think could help your situation. We recently posted on HN that we have decided to offer our services for free for a select few startups. If you're interested, check out http://iactionable.com/free-for-startups http://iactionable.com/free-for-startups and mention this discussion and we'll get back to you today.