I've got dozens of sites, more than half of which have some PR (3 on average), legit PR with corresponding high domain authority and page authority. The rest are PR0. Each is on a different IP. Currently I've been using them to boost my own sites. I'm pretty bad at thinking outside the box, though. Is there anything else/better I should be doing? Should I put affiliate offers on them or something? Will that hurt their value? That thread about the 301 redirects got me thinking. I've also got a handful of unused domains sitting in my GoDaddy account. They don't have hosting. Should I 301 them to another domain?