I have 2 questions - say you're going to buy or build 50 high PR contextual links (and you're trying to rank the keyword "link building" - just an example): 1) what anchors would you use for the 50 links? (exact match, related, generic etc - what would be the ratio?) 2) what content would you use? does it have to be 50 different articles or can it be one manually super spun article? also, i've been reading about co-occurrence, is this really something to take into account? and what about the content of the article - does it have to be about link building or can it be about something broader like seo or internet marketing or website promotion?