11. Open those closets! Open-house visitors will peek inside your closets. Closet space can be a make-it-or-break-it selling point for buyers, so show yours off to their full advantage by giving excess stuff the heave-ho. Again, this is really important, so even if you need to store a few boxes elsewhere, it's worth it. Aim to have 20 to 30 percent open space in each closet to give the impression of spaciousness.