I am into link building industry since 1999 lot of concept development by linking experts from time to time but use of software or link exchange sites and other bulk method has not produced much results.
The best way is to go for manual link building from theme based authority sites relating to your industry. Even few links are sufficient for getting good ranking and traffic. In my opinion does link building for traffic and search will be automatically rank you? Be natural and organic and get links which search engine loves.