How do you guys go about getting sustainable links from high authority sites? In some markets, like say SEO, it can be as easy as writing great content and "people will share it" because there are a ton of SEO websites on the internet and all of them are talking about SEO and want to share with you great SEO content. But as you guys know there are markets that aren't as well developed online - where do you look for backlinks for these markets?
I'm working on a project and I'm trying to put together a good backlinking strategy. Part of it will be chasing backlinks from University websites (relevant to my market). What I'm wondering here is if its OK by Google to barter for links. Say you have an online store and you give the University a "student's discount" in exchange for a link (I don't know if this would be appealing enough but is it fair game as far as Google is concerned)?