I have two closets in the room in the front of my house that I use as an office. The closet on the right contains stuff I need on a daily basis. For example, my checkbook, the backpack for my laptop, a book I'm trying to get through and hard printouts of current projects.
The closet on the left side of this room contains things that I will need but nut necessarily on a daily basis: blank envelopes, blank media discs, and older fiscal records on the way to the shredder. Thus I decided the left closet is the Costco of my office.
In that vein, the dining room is the Costco of the southern half of the house including itself, my office and the living room (which has no storage space). The breakfront in the dining room contains games, extra vases, extension cords, pens and pencils, and a hammer, nails and screwdrivers.
To continue, that makes the mud room in the back of the house, the Costco for the upstairs of the house (garbage bags, cleaning supplies) so a daily trip to the basement is not warranted. I'm getting older.
And to complete this virtual trompe-l'œil, the basement is the Costco for the whole house - reams and reams of toilet paper so we never run out (Costco brand), reams of paper towels (not essential enough for reams and reams), sponges and laundry detergent. The electric tools and brooms are relegated to the backyard - the Costco of the property (cat litter, bird seed, buckets, hand truck).
I am writing now with the Costco of my brain - reams and reams of thoughts, really cheap.