There are so many link building tactics; some will be more suitable than others. All of these tactics require some work, but once you have links pointing back to your website, it will be easier to earn backlinks naturally, since more people will see your outstanding content.
Learn how to compose .edu link bait by creating educational material in your niche. You'll need a separate page on your website for educational content because no one wants to link to commercial content. Use a lesson plan format, which you can find online, and then find educator groups on social media where you can request a link by asking if your work would be of value to them. You will need extremely well written content that lists sources to get a link.
If you have an e-commerce website and you accept cryptocurrency, there are numerous websites that list online retailers that except Bitcoin and other cryptocurrencies. Submit your website to these directories.
Look for opportunities to guest blog on quality sites. Write a helpful, relevant article that is free from any spelling or grammar errors. Write about a topic the blog covers and only mention your brand in your bio.
Look through industry forums and Q&A sites, such as Yahoo Answers, and find instances where you can answer the person's question first. You can include your link in your signature, but not in your answer, unless the question asks for a URL.
Create an infographic, or pay someone to do it for you, that has little known facts about your niche and post it on your social media platforms. Ask friends to share your infographic with their followers.
Finally, don't forget internal linking. Don't go overboard, but go through previous posts if you have a blog and see if you've written something more in-depth that you can link to today.