Impose a space limit
As if by magic, the volume of our possessions seems to expand to fit the available space. Before we know it, that larger house we scrimped and saved for is just as cramped as the smaller one we left behind.
To help combat the creep of clutter, impose a space limit for problem areas. For example, decide to accumulate no more kitchen utensils than will fit into a single drawer, or only enough makeup for one cosmetics bag.
Using a finite physical space to limit the seemingly infinite potential of clutter is relatively painless and helps keep those mole hills from becoming mountains.