Here are several ideas. R emind your children how to show repect through actions. E ncourage your kids to think about others. That's why I always knock before going into his room. P lay with your children in ways that teach respect.
E mphasize when they're unhappy.
I'm sorry your fish died. I know how much he meant to you. C onsider how your words affect your kids. If they misbehave, critisize their behavior. T reat children as you'd like them to treat you.