Off-page optimization is critical for being visible within the major search engine, like Google, Yahoo, Bing, ASK...
Off-page optimization techniques focus on improving the web site online credibility by evaluating the external links quality pointing back to your website. The more quality external links that you have pointing to your website the higher your website will rank on the SERP (search engine results page).
One way to increase your links is by exchanging links with other websites (reciprocal linking). Even better when you create relevant content and the readers will link to it from their website.
One-way linking is the best way to build links to your website by creating valuable, unique content that naturally attracts readers.
There are many ways to expand your website external links.
BLOGGING is a great way to expand your website content with relevant intriguing information that readers can use as links on their website. Using Social media is another great way to go where your customer are. Use Web directory submissions, Press releases, Yahoo Answers are very valuable methods to get your website promoted on other websites.