Positive reinforcement - Put a cotton ball, marble, pom-pom, etc. in every time you catch your child being good. Do something special when it's full. This is exactly what I need instead of focusing on the bad.Could work in the classroom too
Make a candy bar sleeve out of an envelope that looks like a dress shirt and tie. It was a big hit. They also put a "footstep" tie tac on it and pasted the "walk a little slower" poem to the candy bar.