Nowadays marketing strategy has been changed a lot. Now Blogging becomes one of the most important and legitimate ways to increase traffic, popularity and obviously to encourage business. But what would be prospect of "links submission technique”? Is it obsolete?
My opinion is submitting your website to quality web directories (speaking of which, 95% are paid) is a good strategy. So I consider link building is not an obsolete practice as long as you accomplish your tasks according to google's rules. Guest blogging is a good option if your article is accepted on quality blogs (with high PR 5-6-7 and DA at least 40)