Build a strong foundation with a strategic selection of basics that will mix with almost everything in your closet.
Shown, left to right:
Black tank: A white tank looks right at the gym and for casual outings, but a black one can be worn with everything from khakis to a cocktail skirt.
Crewneck sweater: Opt for thin knits in cotton or wool that layer easily.
Jeans: It's worth paying extra for jeans that actually fit and flatter. Your best bet? Stretch denim with no more than 2 percent Lycra (the fabric will follow your curves and keep its shape).
Long-sleeve white T-shirt: Looking thin in white doesn't have to be difficult. The trick? Choose a slim-fit T-shirt that skims over your body (but doesn't cling).
Khakis: Forget the pleats (a flat front is more flattering) and forgo the front crease, too. After all, these are casual pants.