What to do with boxes you never unpacked
A box you have not opened since the move is not a chore you have been putting off. It is an answer you already have. Everything in it has gone this long without being needed, checked, or missed — which is a stronger verdict than most of the deliberate "should I keep this" decisions you agonize over elsewhere in the house. The box did the deciding for you. Opening it is not the hard part; believing what it already told you is.
Why it never got opened in the first place
Packing happens under bad conditions for making decisions. You are tired, on a deadline, and moving fast, so things get swept into boxes in whatever grouping was fastest — "desk drawer," "top shelf of the closet," "whatever was still out on moving day" — not by what they are or whether you want them. That box does not describe its contents to you the way a labeled shelf does, so there is no moment where you would naturally open it. A drawer gets opened because you reach for something in it. A sealed box in a closet or garage generates no such moment on its own; you have to manufacture the reason, and "I should really deal with that" is a reason that loses to everything else on a given day, every day, indefinitely.
This is also why the box outlasts good intentions. Nobody decides to keep something sealed for a year. It happens because opening it means making ten or twenty small decisions at once, cold, with no context for most of them — and a pile of small decisions with no urgency behind any single one is exactly the kind of task that always loses to whatever is in front of you today.
The one kind of box that is fine to leave sealed
Not every unopened box is a decision you are avoiding. Holiday decorations, off-season gear, the spare parts for furniture you have not assembled yet — these were boxed on purpose, to be opened at a specific and predictable time, and leaving them sealed between now and then is not procrastination, it is storage working as intended. The test is whether you could say what is inside and why it is still closed. "Winter decorations, because it is not winter" is a real answer. "I don't actually know" is not — and that second answer is the box this page is about.
A pass that does not mean re-deciding on everything
You do not need to sort every item individually the way you would if you were decluttering a closet you use daily. Most of what is in an old moving box has already been implicitly decided by the fact that you have gone this long without it. Open one box in one sitting. Before you lift anything out, ask the honest question: could you have named three things in this box without opening it? If you could not, that tells you almost everything already — this is not a box of things you are actively using or missing, and most of what comes out of it can go straight into a donate or recycle pile without a second look at each item.
Pull out only what stops you — genuinely useful items you had simply forgotten you owned, documents you need to file properly, and anything sentimental that deserves its own slower decision rather than being rushed through with the rest. Everything else does not need individual deliberation. The box already ran that experiment for you, for a year or more, and the result came back negative.
What is usually actually inside
A predictable handful of things show up in most long-sealed moving boxes: paperwork that should have been filed and instead got boxed, duplicates of things you bought again because you forgot the original was packed away, chargers and cables with no device attached to them anymore, and a smaller layer of things with real sentimental weight — cards, photos, a few objects tied to a specific person or time — that got packed with everything else because there was no time on moving day to sort the sentimental from the ordinary. Separating that last, smaller group out is worth doing slowly. Everything else in the box has already answered the "do I need this" question by not being needed for a year.
Where an inventory helps, and where it does not
Cataloguing the contents of a sealed box before you have even opened it is not useful — you would be spending real effort structuring things you are about to give away. Where it does help is afterward, with the smaller pile of things you decided to keep. Kept is built for exactly that moment: give the kept items a home, a photo if it helps you recognize them later, and a last-used date that starts counting from today. If that item goes another year without being touched, it will surface on its own the next time, instead of needing to be rediscovered in a box in a closet.
What "done" looks like
Not a house with zero boxes. A house where nothing sealed and unlabeled has been sitting in a closet or garage for longer than you could explain if someone asked. The boxes that remain are the ones you could describe on the spot — what is in them, and why now is not the time to open them — and everything else has already told you what it was for, which was nothing.