I would like to know the link building method you are using.
Well, according to me, natural links are good as Google likes natural links so you should use as many methods of link building as you can so that you can build natural links.
@Shane_WatsonMar 19.2013 — #Best link building techniques are Social bookmarking, directory submission, article submission, image optimization, press release, blog commenting, yahoo answer and sharing link on social media sites.
@Steve_SmithApr 15.2013 — #The best link building method is one where the user links on their own to you. That's best done through the content. Write amazing content that would compel people to share. But unfortunately that's difficult to create & an amazing content can be time intensive and expensive. So, the alternative is building it through other types like blog commenting, guest blogging, article posting etc