This is a marketing tip I did last year, and plan to do when my next book comes out (marketing has been a bit quiet this month while I’ve been working on my book for the Chapter Book Challenge).
With every book you publish, put aside a certain number of books that you can send to reviewers. These can be either print copies or ebook copies.
Sending review copies can help your book get reviews on Amazon, Goodreads, on blogs, and the print media, spreading the word about your book. Reviews are a great way for readers to discover new books.