Have clear black and white standards about right and wrong. Apply these standards consistently. If you do, they will learn to persist until you give up or give in. All too often, we allow ADHD children to misbehave and get away with bad behavior because we have low expectations for them. If we don't expect them to control their impulses, they won't.
Low expectations lead to low performance.
In the end, the child can do better on a task or mission than a regular child without ADD, but only if your expectations for success are higher. In her family, her word was law - and she never had to raise her voice. When Dr. Hazra talked to parent groups, she walked them through this exercise. Picture a large three-ring circus. Thousands of screaming children, a blaring public address system, flashing lights.