Securing 'unidirectional' or only-Incoming (non-reciprocal) links
Links with relevant "Keywords" in the Anchor Text.
Links from sites having a different range of PageRank
Links from industry-relevant pages
Link to your site should not be through a "redirect" script
No JavaScript links
No links from 'framed' pages
No 'flash' embedded links
No Robots Tag excluded link pages
No paid or time-bound links
Links spread over different domains
No links from Link Farms
No links from FFA (Free-For-All) link networks
No links from Blogs and Blogspots
No links from pornographic and other sites containing offensive content
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