Backlink is the most important things to get good ranking. There are lots of methods to get backlinks but one of the best and most popular method is Web 2.0 creation now days. There are lots of CMS base websites which provide to create web 2.0 pages and you can post your own unique articles on that page. It is one the best technique to improve crawling rate and get quality backlinks. It is also used to create link wheel between different web 2.0 pages.