Link building is very typical process now a days. we work hard to write post and start blog but unable to generate high traffic, because our site is unknown on internet. Then our first step is link building. which is not free on internet or you will get no follow link.
Here is a easy step to get back links.
Go to
http://www.linkvink.com
and link a post.
Here is an option while you linking a post which allow one link per post, which is Do follow.
Start linking now until it become paid. It is free as of now.