Tie-Ready Dress Shirts
Credit: Photograph by Greg Broom

Shirts are the key to having a truly interchangeable wardrobe. Go with solid white, blue, and a few stripe combinations, and avoid spread collars that are too generous in width (today's ties and lapels are cut narrow). Look for semi-spread collars, which look great with or without a tie. [Burberry slim fit striped cotton shirt, $225; us.burberry.com]