When we sold we packed up 3/4 (or more) of each closet. For each bedroom we left a color coordinated selection of clothes (2 sweaters, 5 shirts, one dress hanging and 2 pairs of shoes). The majority of the closet should be empty. For linen closets have one thing on each shelf (a stack of 2 towels, one neatly folded set of sheets, a basket, etc.). The idea is that a person should be able to see a lot of empty space, but still see functionality. If they are overstuffed (or even just full) it gives the impression of there not being enough storage in the house.