In my study of happiness, I’ve realized that for most of us, outer order contributes to inner calm. Easy, quick, regular habits make it possible to manage possessions before they accumulate into clutter. My new book Outer Order, Inner Calm: Declutter and Organize to Make More Room for Happiness offers tips and strategies for tackling clutter. One simple concept from the book that seems to really resonate with people is this: it’s far easier to keep up than to catch up,…