The key to getting links to your site naturally is to create unique, compelling
content that other people want to link to. Google is very good at detecting unnatural
links that violate our Webmaster
Guidelines (for example, those that come from link-exchange schemes, paid links
schemes, or are auto-generated), so participating in such schemes could end up doing
more harm than good.
Watch this video for some ideas about getting people to link to your site: