You can either buy or exchange one way links with other webmasters who own seo sites with high page rank and high relevancy to your niche which will increase your rankings on Google.
You can submit articles to article directories and leave a link back to your site. Do your on-page seo well. Comment on blogs. Submit to web directories that are high page ranked.
If you comment on blogs with a name repeatedly then Google will hurt your site mine was hurt really bad down from 20k day visitors to 200day.
From my experience only buying links can help you achieving your goal. I would like to hear from you ? Did you get some results ?
Can I create PBN via web 2.0 sites and can drive link for my money site? and Is can impact my search engine ranking?
Is it true or not? because I saw Brian Dean status and he told if you making backlink via similar name(Natural Way), this process can not harm but if you use multiple names or any focus keywords then this process can harm your website.