Simplify and make things multi purpose where possible. The photo shows us that our ancestors did this. The inscription is a will posted on a church wall. It shows how a dead parishioners money will be spent. In this way the donor is respected and her money is used with a transparency that is unknown today.This may seem surprising but let us imagine a spare bottle of shampoo sitting on the side of your bath. It is costing you money in all of the following ways.
Capital costs- if you had not bought it then the money would have been used for other purposes.
The object requires attention (dusting, sorting and so on). It becomes a time drain.
Physical clutter often leads to mental clutter and stress. This leads to depression and loss of vital energies.