Been out of the SEO game for a little while now, and i'm attempting to break back in. I have 9 sites that are currently aging (exact match domains, with 1k words of content, single pages). They are ranking well, page 2-3 for their keyphrases (no link building). Once they age a little more (2-3 weeks, i'm going to start my case study). The sites will be split into 3 groups: Control: No link building. Test group 1: Link building is going to be done using article marketing (700+ distributions of a single spun article per site) Test group 2: Have not came up with a link building strat to test against test group 1 yet. I would like to get suggestions on this. Assumptions: I would like to go with a service, rather than purchasing any software at this time. Once I find "my method" that works, i plan on going big (x100 domains or so). Whatever method that i use for group 2 should be somewhat "hands off" AND "cheap". These are low competition niches (500k exact match tops), so i don't want to go overboard. After choosing a method for group 2, I'll start the comparison, and update this thread with my results.