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The best place to get started is by reading up on link building posts here on SEOMoz: http://www.seomoz.org/pages/search_results?q=link+building From there, I'd check out the Link Building Basics section in the Beginner's Guide to SEO. That should keep you busy for quite awhile, but once that runs out, check out Point Blank SEO's list of link building strategies. You'll rarely run out of ideas there.