Authors should write ten to twenty guest blog posts for sites that your niche read to explore a new audience, new readers, it will help to increase back links because you are able to include a bio with a link to your website. Always remember, you don’t need to directly mention about your eBook, but the subject of the guest post should relate to the subject of your book so that readers get interested enough to land on your website and then they consider buying your book.

Keep trying to make a relationship with influencers and other bloggers and request them to share it with their network if they enjoy it

Visual contents are one of the fast-growing industry nowadays so keep posting on image share media like Instagram and Pinterest.

Approach the magazines and do press releases. Publish on content mills.

Tweet about your website several times per day.

Email marketing, many people make the mistake to underestimate the power of email list. Check my article "Things that matter when you are using email marketing". Built your email list now.