You can get tons of uniques from Wikipedia, but it requires something more than five hundered auto generated spam blogs and one lazy-ass wannabe-internet "marketer".

Okay, so here's the deal. First you need a site, witch is absolutely relevant to that topic you're going to put your link. It has to be clean, good looking and not spammy. Then you register yourself and start editing that article. Do NOT just put your link in the article. You have to edit that article little bit better, just fix it a little and add some extra information and use proper english (all your time and effort is worth nothing if you write english as badly as I do). Then - not any sooner - you add your link in "read more"-section. Remember to use good title, clickable, relevant but not spammy or ad-like (ad-like, is that even a word?).

This is important: there's little text box before "submit"-button. You write couple words in the text box to explain, what you did. Like this "fixed some typos, added some missing information and a link". Why's this? Becouse, there are some nolife dudes sitting in front of their computer all day (hmm... just like me) and hitting refresh on "recent changes"-page on Wikipedia. Important thing is that you don't look like advertiser, you have to act like normal wikipedia volunteer.

If someone needs more tips and tricks about this topic, just lemme know.