I have been working with SEO for over 8 years now and offering a online class to learn seo. Search Engine Optimization has been around for a long time now, but recently search engines like google have really made it difficult to even rank normally without seo.. Here is a link to the class http://www.learnseoclass.com.
I have been working with search engines for a long time and one the worst seo mistakes that I have seen recently is doing link exchanges. I dont really think they work any more unfortunately. It was a great way for people to increase their rankings, but now it seems to not help.
I have helped many website acheive the rankings that they desire through hard working techniques.