Hello friend...... I gather backlinks gradually by sharing some valuable resources in the free resources section of my website. I also gather them manually from different websites that allow both dofollow and nofollow backlinks. 

The simple hack is just to share valuable resources on your site and promote your site on different websites such as Quora, Reddit, Tumblr, FB, Instagram, etc. With time, the backlinks will grow exponentially.

let me know if you have further questions friend