1 Invest in a wrap dress. Universally flattering, asymmetrical cuts "whittle down" your waist and hide trouble spots. Designer Diane von Furstenberg, who popularized the look, explains: "A wrap dress does exactly what it claims: It wraps you. And because it's typically made of jersey fabric, it molds to your body, helping to sculpt it."
2 Sport a V-neck top. The neckline narrows as it plunges--the lower, the better--emphasizing the length of your neck and upper body and giving the illusion of a leaner line, says Ann Taylor creative director Michael Smaldone.
3 Avoid pleats. Whether they're on the waist, hips, or neckline, extra fabric and fussy details like ruffles and gathers can make you look bulky. Stick with simple shapes.
4 Dress in all one color. You've probably heard that wearing all black makes you seem more slender, but--surprise!--going head to toe in any dark hue like chocolate, navy, or charcoal achieves the same streamlined effect.
5 Keep pant hems long. Tailor your trousers so they're no shorter than half an inch from the floor. A straight-leg cut gives the appearance of a lean, never-ending leg, says designer Elie Tahari.
6 Put on heels with pants. They'll make you stand straighter while lifting your butt and elongating your legs. Creative director Holly Dunlap of Hollywould recommends a pointed toe over a round toe for the best results: "Match the shade of the shoe and pants as close as possible. This draws the eye from the point of the toe to the torso, creating a seamless silhouette."
7 Wear vertical lines. They lengthen your figure because the eye naturally follows the pattern, making you look taller and thinner. But don't overdo it. Varying widths and colors can be distracting, not slimming. The best bets? Try a turtleneck under a striped dress in a basic shape, or pin-striped pants paired with a blouse in a solid color.
8 Accessorize with long necklaces. Bold or layered chains that fall from midchest to your waist pull the eye downward, making you appear more trim, says L.A. jewelry designer Chan Luu.
9 Hem your skirt to the perfect length. It should fall just above or just below your knee, emphasizing where your leg tapers between your thigh and your calf. Midthigh skirts draw attention to the thickest part of your leg, while ultra-long skirts can look frumpy.
10 Choose clothes that fit just right. Sounds obvious, but if your self-confidence is flagging, it's easy to dress in baggy outfits that only add volume, and too-tight pieces are unforgiving of even the slightest bump. Trust us: The proper fit will automatically boost your confidence--and your style.