Children with attention-deficit/hyperactivity disorder (ADHD) often experience problems with temporal and materials organization. These difficulties remain prominent throughout development. For children, organizational problems are most apparent in the school setting and result in impairments such as lost and forgotten homework assignments and inadequate planning for tests. Temporal aspects of organization tend to be most salient for adults with ADHD and manifest as procrastination and missed appointments and deadlines. Skills and strategy training interventions have been developed to address the organizational problems of children and adults with ADHD. Patients are taught systems for managing their time and materials more effectively. Contingency management is often used in conjunction with organizational skills training to promote the use of organizational skills and their generalization. Organizational skills interventions have been evaluated as standalone interventions and part of multicomponent interventions for children, adolescents and adults with ADHD. These interventions are associated with significant improvements in the organization of materials, homework management, time management and planning. There is also some evidence to suggest that organizational improvements lead to reductions in ADHD symptoms and gains in academic functioning. Additional research using randomized controlled research designs and long-term follow-up evaluation is necessary before organizational interventions may be considered established evidence-based interventions for patients with ADHD.