Photo: Sam Kaplan

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6. Peter Says...
"You know what's black-and-white? My rule about surface clutter."

In fact, I, Peter Walsh, hereby decree that from this day forward, no more than one-third of any flat surface in your home—I'm talking coffee tables, side tables, your bedroom dresser—may be covered with tchotchkes. Remember, fresh spring air cannot breathe life into your domicile if every room is overstuffed with souvenir snow globes and your grandmother's vintage bird taxidermy.