I outsource all of my SEO to seoclerks now. I've found a couple of expert sellers that actually show improvement so I put together a list of deep links for my sites, then outsourced it all to them. As I add new content, I just order a new service. It frees me up to do what I do best, create quality content.
I also use their sister site, socialclerks.com, for free facebook likes, tweets, etc. Those will help your SERPs too.