There are many techniques used by SEO for increasing website backlinks, such as directory submission, blog comments, social bookmarking, press release, PR distribution, classified creation, classified add posting, video marketing, RSS field submission etc
Social bookmarking can be an effective alternative. This process not only boost ranking of website but also increase backlink of your website on high quality websites. Apart from this blog creation and blog commenting can be valuable in this context.
If you want to increase website backlinks then doing work on the below SEO techniques.
Blog directory submission
Search engine submission