the best way is to forget about link building and concentrate of developing quality content on your site. in a long run, people will recognize your site of its worth and you will gain natural back links plus word of mouth traffic.
if ur website is new spend 2-4 months on site and create something good on ur site, inbetween search forum which is similar to ur site and meet peoples, spend some time, create good relations and after few months u can use link exchange also try to ping ur website.