I personally, have 3-4 links to other related free sites, same niche, etc... and a link to a hub with all of them...
I do the 3-4 links for link pop, se spidering, and sendin traffic to a different or similiar niche.
Also put a link to your hub atleast on all of your pages, and you outta be able to get a spider in there for some fun. =)
There isn't one "right" way, there's just a bunch of decent ways, and a few great ways that people dont like to talk about.
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