As per my view both the on page and off page techniques of SEO are important because if we use the off page techniques like forum posting, blog commenting, directory submission, article submission and social book marking with the relevant keywords and title, quality, original and topic related contents then it will help you more.
Try this simple and yet effective method: http://www.seospeedsight.com/seofor...-simple-and-yet-effective-backlink-strategy!/
SEO is all about the content and quality backlinks You should develop your website according to new Google Guideline, great content, social share bottoms, easy navigation and some quality backlinks are enough for getting right position.