This resource is such a goldmine that I must share it.
As Tyrone Li mentions on the BookBub site, GrubStreet held their annual Muse & The Marketplace conference for writers in April. There, "authors, agents, and editors hosted talks and panels on craft, the publishing process, and book promotion strategies. We gathered lots of helpful publishing insights and promotional tips on a variety of topics, from marketing on social media to participating in bookstore events-- and even to dealing with author envy! We're excited to share some of these tips with our readers who couldn't attend, and hope you find these takeaways useful."
You'll find those tips online at https://insights.bookbub.com/promo-tips-muse-marketplace-2019/. There is some great information here. For me, the author social media hints and the insights on juggling a day job with your writing practice to be particularly helpful.