Create something interesting to link to like a daily top 10 and then publish result to website, twitter, opt-in email, etc. Once you have a top 10 you have something for people to link too.
Organic SEO (search engine optimization) refers to content creation strategies that do not require paying for an advertising campaign. Generally speaking with an organic SEO content create strategy you want to publish a volume of quality content. When using Google the organic search results are the results that are not sponsored. Sponsored results are usually found at the top and to the right of the search results.
Google Analytics is a great tool to help you analyze traffic on your website. Amongst other things with Google Analytics you can track visits and keywords.