Your best foundation type is a liquid foundation with a wide shade range.

"It's easy to go wrong when trying to find the right shade. People generally see themselves as a shade or two darker than their natural complexion, which leads to a poor match and a visible jaw line," says Stern. To remedy this, make sure that your foundation matches in natural light (go outside with a mirror if you must). If buying from a drugstore, go with one that offers a color guarantee so you can take it back if it doesn't match. (Check your local store's return policy here.)

As for coverage, choose a buildable liquid foundation with a wide shade range. Ones to try: Shiseido The Makeup Dual Balancing Foundation SPF 17,$36; CARGO Foundation, $28; Lancome Color Ideal, $37; CoverGirl Queen Collection Oil-Free Moisturizing Makeup, $7.77.

TIP: "A good liquid can be layered to achieve a natural, yet full coverage look," says Stern. "Use them with a light hand to avoid a mask look." For lighter coverage, mix with a tinted moisturizer or apply with a damp sponge. For full coverage, mix with a thicker foundation (like Prescriptives Any Wear Multi-Purpose Makeup Stick, $35) and use a dry sponge or concealer brush to tap on over trouble spots.