Someone asks for the appliance model number, and suddenly everybody is opening drawers. There is a manual somewhere. Or a photo of a manual. Or an email from the store, probably under a different name. Sound familiar?
Begin with the next question
Do not try to archive your entire life. Start with the things you have looked for twice: appliance model numbers, a paint color, the name of the person who fixed the fence. A plain folder or a single shared document is fine. Choose the format the people in your home will actually open.
Make the label do the work
“Kitchen refrigerator — model and manual” is more helpful than “House stuff 4.” For digital files, use ordinary words you would type into a search box. For paper, a few broad tabs are usually easier to maintain than an elaborate filing system.
Keep sensitive identity, financial, and password information out of a casually shared household document. This folder is for practical reference, not every private detail under one roof.
Give it a small maintenance rule
Whenever something changes, replace the old note. If you buy a different filter, update the size. If a service contact is no longer useful, remove it. You do not need a weekly administrative ceremony. You need information that is still right when somebody reaches for it.
Put a short “start here” note at the front. Tell the other people in the home where the folder lives. The cleverest system in the world is not much help if only one person knows it exists.