One-in-one-out
The discipline that keeps a storage system alive: when something new comes in, something leaves. Without it, even a perfect storage plan silently overfills within a year. The reason storage is a system with inflow and outflow, not a one-time build.
New in, old out — or it overfills
Every system needs an outflow point — a donate box by the door, a yearly edit before festivals — not just shelves. Storage you only ever add to is storage that will fail.