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Though, I do not have much experience in this context, what I have noticed is getting links from high page ranked sites rather the similar page ranked sites of similar industry, is a better approach. Its easier to get these links if similar page ranked sites of similar industry ( but not your competitors obviously).
You can also increase link popularity by adding into various directories with categories related to your industry.
The Open Directory : Dmoz should be the first step. The data is provided to a large number of search engines and directories including Google.
I had the webmaster for the #1 site in google under our main keyword put a link to our site for "widgets" "discount widgets" and "cheap widgets".
His PR is only 4 while ours is 7 but I figure if google sees his site as #1 this should boost us up a bit since we fell way down after the last indexing.
He has put his internal tracking on those links but they are going to our homepage, I dont think this is a problem for google but am not sure. Any advice on this?