A few trousers or a few skirts or a few suits in basic colors can be worn more than once. Use shirts, ties, scarves and jewelry to add variety or to dress up for evening social events. Inspect your pieces and try on anything you haven't worn in a while. Pay attention to details, too. Good shoes, well-fitting pieces and handsome luggage show you are put together even on a harried business trip.
Knits travel well and resist wrinkles.
Lightweight wool and the new polyester blends are also great choices. But a few hours in a tightly packed suitcase can wrinkle even the best fabrics. Dry-cleaning bags or tissue paper folded between pieces can help prevent wrinkles. Even though much of your packing will be focused on what to wear at your destination, also give some thought to what you wear along the way. Men and women can carry on a jacket but should never sit on one during the flight or a car ride.