There is 1 book I have heard of - I forgot what it is, temporarily.
I think that crisis counseling training would be most beneficial to me in my work with postpartum women - though I haven't taken any, yet. Also of course lactation training is useful - I'm a lactation educator now, maybe I will certify as a CLE.
In addition, I think motherhood is really useful training, and of course reflective listening skills. Anyhoo, I want to start developing routines, similar to what Flybabies make themselves: flylady.net
If anyone has routines they'd like to share, I'd love to know some of them.