Today major search engines are trying to find algorithms to separate text link exchanges between webmasters from human created references to/from websites. I think every webmaster by now has already noticed that a website can hardly benefit from a regular link exchange. You may have thousands links pointing to your website and do not see any results in improving search positions and page rank. You must have heard about articles exchange, which is way better than any other SEO tools and tricks, including link exchanges. If a search engine finds 10-15 articles from relevant websites about your website with links pointing to it, it is worth thousands of links from different link farms. I recommend www.articles-exchange.com as the best articles exchange offer on the web available.