Hearing good things makes us feel good and makes us want to do more good things. Say two nice but true things to children for every time you correct them. Remember, when they are changing their behavior, tell them how well they are doing, even if they only improve just a little. Great, you played in the playground all morning without fighting. One thing is to set routines for bedtime, meals and chores.
Routines help children feel safe, because they know what parents expect.
Young children have a hard time going from one activity to another. Warning them a few minutes ahead helps them get ready. You can have milk or juice, but you can't have soda. Remind them of your rules. Just saying no is not enough.