Ady boy beginning to assert himself and wants his way. I think time for discipline. Any suggestion for toddler this young?

Hmm... Ady boy beginning to assert himself and wants his way. I think time for discipline. Any suggestion for toddler this young? It would be good to start early otherwise it will become difficult when he gets older. Yet on the other hand we would like him to explore the world and learn new things for child development. Must be a way to balance what he can and cannot do. Sent from Yahoo! Mail on Android