yup link building is a fastest way to get more and more traffic.. it should be done wisely according to the content and niche
if you ask this question, so you do not understand main principles of website development... i recommend you to learn more about search engines, sources of traffic, affiliate programs, etc. and remember - content is the king
Yes content is the King with out link building also i think i am getting traffic for another Wordpress Blog over 3500 contents in it.