Here is a list of helpful resources if you are interested in reading more:
Books (General parenting)
Becoming the Parent You Want to Be by Laura Davis and Janis Keyser
Books (Parenting children with special needs)
Parenting Children with ADHD by Vincent Monastra
An Early Start for Your Child with Autism by Sally Rogers, Geraldine Dawson, and Laurie Vismara
Books (Behavior)
I Brake for Meltdowns by Michelle Nicholasen and Barbara O'Neal
No More Meltdowns by Jed Baker
1-2-3 Magic by Thomas Phelan
Positive Discipline for Preschoolers by Jane Nelson
The Explosive Child by Ross Greene
The Incredible Years by Carolyn Webster-Stratton
Books (Activities)
The Preschooler's Busy Book by Trish Kuffner
Kitchen Table Play & Learn by Tara Copley and Andrea Custer
Books (Sleep)
Healthy Sleep Habits, Happy Child by Marc Weissbluth