Link building then link earning SEO
There isn’t much link building that you can do on a website. Once you have submitted your website to all the good directories, posted links on guest blogs or forums and have requested links from the contacts you have such as your web designer and friends then that’s kind of it.
Microsites
You can then build expensive microsites to get more links without buying links but you would better spend your time on content creation and link earning.
Link earning
You can spend your time developing cool content and features for your website in order to gain you links. Good themes or wordpress plugins earn links naturally as do reviews about your products or services on other websites.