Quotes from Alan E. Kazdin

Parenting stress, the range of pressures and worries that comes with the role of being a parent, is often significantly influenced by your own expectations, beliefs, and sense of your duties as a parent, and by your child's reactions to them.

When I explain to parents that the research shows clearly that a one-minute time-out is sufficient for changing behavior and that we gain nothing but problems with much longer durations,

a child hears the question as a question, not as something he needs to do. Also, don't just say, It's time for bed. That's not as definite a directive as parents think it is. Be absolutely clear, explicit, and direct: Please go to your room and put your pajamas on and get in your bed. Clarity is not only good for your child, it's also good for you and your family.