Organize items by category - lawn & garden, sports equipment, automotive, etc. Store seasonal items up high or out of the way; frequently used things - broom, dog leash, mud boots - should be easily accessible near the door to the house. Discard items that you haven't used in three years. Cabinets work well for small things and to keep stuff out of sight. Open wall systems are great for long things like shovels and rakes and for kids toys, bikes, etc.