To the newbies out there: Know that publishing houses do little if anything to promote your book. They expect you to do a lot of it, and that must show in your proposal to them.
That said, I admit that Marshall Cavendish treated me like a queen. They were always willing for me to have a signing at the American Library Association conferences and, when I won the Pura Belpré Honors, they paid for my plane ticket and put me in the best hotels. They even threw a banquet for the Belpré committee when Diego: Bigger Than Life won. (I am talking in past tense because Amazon.com has bought Marshall Cavendish Children's Books and I don't know what they will be called yet.)
Still, I promote my books: This blog, Facebook, my website (www.camenberniergrand.com) school visits, signings, conferences...and teaching at the Whidbey Island MFA (I tweet for them) doesn't hurt.
I befriend and support librarians and independent booksellers. But what I support the most is my fellow writers. I try to be there for their signings; I buy their books; and I promote their books everywhere I go. I do this because I care for them and their books. But you know what? Those blessings and many more have come back to me.