Links are not all the same. There are good and bad backlinks that can make or break your online reputation. With this, it is important to know where to get quality links and the right approach to get them.
Different niche needs different kind of links. Links may come in the form of direct links, forum profile, URL comment, author bio and a lot more.
Finance sites for example will have to get quality backlinks from high authority finance sites. There are tools that can be used to check domain and page authority. The same holds true for other niche such as health, beauty, parenting and dating.
One good source of quality back links are local directories which restrict out of the scope websites from submission. If you are promoting a local business such as Sunderland dating website, manual directory submission on high PR directories can boost your ranking.
Article directories that allow do-follow links on author bio can also give you quality backlinks. Other things that you can do to keep getting quality links are blog commenting, posting in a forums, 3-way link exchange and publishing quality content that other people can use as a reference with a link back to your site.
But in linkbuilding, you should do everything in moderation.