The best way parents can keep parenting simple and effective is to stay one step ahead. They can empower themselves with knowledge of how kids are likely to grow in next six month or one year. How their needs are likely to change. What good / bad behavior they are likely to exhibit. How they can be challenged further to learn new things and so on.
All this might sound daunting but the good news is that in today’s world it is real easy. It could be as simple as reading couple of good articles found on the net.
This simple practice can save parents countless hours of frustration.