The website, 30 Day Books, offers marketing advice and tips for pre-self published and published authors. Even though I am traditionally published, I receive their Magic Monday newsletter and have found great stuff there. For instance: I've been working on a new marketing plan for A Warm Winter Tail because the debut shine has worn a bit. Ironically, the Magic Monday tip for today was to create an anniversary or birthday for your book (or a character in it) and use that to start a conversation. It's not rocket science, but its a hook and just the bit of magic I was looking for.
Here's the link: http://www.30daybooks.com/
Good luck and let me know if something you read on 30 Day Books helps you, too.
This blog shares insights on the craft of writing children's books and the publishing industry, and supports creators on their journey.