One-In-One-Out Rule

The One-In-One-Out Rule enforces a deceptively simple constraint: for every new item entering your home, one must leave. This strategy forces intentional purchasing and prevents the slow accumulation that turns organized spaces chaotic within three months on average. Compared to Project 333 — Capsule Wardrobe Challenge's Project 333, which targets wardrobe overhauls, this rule applies more broadly to all household items, reducing overall volume by 20% in trials.