One Way link is the linking procedure where no back link is required. One way linking is the best for your site as compare to reciprocal linking and three way linking... some other tips please visit my blog http://patilsanjay4u.blogspot.com
Google knows who links to what. When using a one way link google sees it and know that this link has been given because your web site is "important" When using the 2 way or even the three way it arouses suspicion that you just exchanged links, meaning it's not a natural link pointing to your web site because of its content...
1 way. Although it will take you a little longer than the other two, it's well worth it. You'll get site-links, PR and traffic increse faster in the long run
If you apply all 3 techniques in some controlled proportions along with updating and adding content to your website every search engine should look up to your website and put 5 stars by its side resulting in high SERP and traffic.