It’s a familiar scenario—your perfect pedicure gets an ugly scrape on the first day of vacation. A week of sandals lies ahead, with zero prospect of finding matching nail polish on some tropical island. Take preventive measures! At Kenneth Salon—the world-class pampering spot in the Waldorf-Astoria, made famous by clients who fly in monthly for trims and treatments—you’ll receive primo attention to your nails and be sent home with a small bottle of color-matched touch-up enamel. Maaco doesn’t even do that when it paints your car. (Manicures start at $28, pedicures at $57; house calls from $150 per hour. Kenneth Salon at the Waldorf-Astoria, 301 Park Avenue, at 49th Street; 212-752-1800.)