Don't make it easy for your children to forget.
If your children often forget their homework or other belongings at school, don't always be willing to drive them back to school to retrieve what they forgot. If they regularly lose textbooks or library books, don't automatically rush out to replace them. If you constantly replace lost items or retrieve homework and other belongings, you deny your children the chance to learn to take responsibility. Children learn by experience. Let your children experience the consequences of not having forgotten belongings so they can learn to be more responsible.
Source: The Parent Institute