One way links are the most important and valuable for a website and just a few quality one way links for site may boost ranking. Some different ways for getting one way links are:
Submit your site to major directories, such as Yahoo! and DMOZ.org, in the appropriate category.
Submit articles to article directories.
Publish articles on your site and invite other sites to publish them on their sites, with a link to you.
Participate in forums which allow a text link to your site in a signature.
Get listed in business directories.