Anyone can organize a closet for an afternoon. The hard part is organizing one that's still organized in March. In our experience, the systems that survive share four traits — and the ones that collapse are usually missing at least three of them.
The first trait: they're built around actual behavior, not ideal behavior. If coats end up on a chair every single day, the answer isn't a stricter rule about hanging them up — it's a hook by that chair. Organizing systems that fight household habits lose to household habits every time. Design around what people already do.
The second: less goes in than came out. No storage system rescues a space holding more than it can hold. Decluttering has to come first, and it has to be genuine. If you haven't reached for something in a year and it isn't seasonal or sentimental, it's occupying space that something you actually use needs.
The third: putting things back is easier than not putting things back. Open bins beat lidded boxes. A single deep drawer beats a stack of containers you have to unstack. Every additional step between a person and the correct spot is a step at which the system fails. Aim for one motion.
The fourth: the whole household understands it. A system only one person can navigate reverts the moment that person is busy. Group by obvious category, label where labels help, and keep frequently used items within easy reach for whoever actually uses them.
Start with one space rather than the whole house — one closet, one pantry, one garage wall. Finish it properly, live with it for two weeks, then adjust. Our home organization service works exactly this way across Kenner and Greater New Orleans, and we always walk you through the finished layout so it stays usable long after we've left.