I've given this as advice many, many times. I don't do it myself, though, because I don't keep clothes I don't wear. I have a few go-to outfits for work, and right now my closet is a little more full because I'm pregnant and I am borrowing Maternity clothes from friends, but once I have the baby, it's back to not so much in the closet.

That being said, for people who have too many clothes, I think it is an excellent way of visualizing the excess.