A shirt dress is pretty formal by nature, so choosing to wear it to work is a no-brainer. But to make it more interesting, tuck this dress into a pair of checkered straight-legged pants and top it off with a matching vest. Instantly snazzy. Round the look up with a large tote and a pair of suede loafers.

Dress, $89.90, from Topshop. Pants, $389; and Vest, $333, both from A.P.C. Shoes, $99.90, from Zara. Bag, $59.90, from Mango.

Go casual by layering your shirt dress over a designer t-shirt, and keep it unbuttoned to exude an easy-going flair. Cinch your waist with a belt to put emphasis on your waistline and to elongate your legs, and pair that with a pair of nude sandals.

T-shirt, $6264, from Gucci. Belt, $55.90, from Zara. Bag, $89.90, from Mango. Earrings, $24.90, from Zara. Shoes, $779, from Tibi at Farfetch.

Take this dress to another level by wearing a pair of flare pants underneath for your evening plans. Go with one that has vertical stripes, like this one, to make it stand out. Add tasteful but flirtatious accessories to your outfit, such as this pair of sunshine yellow block heels and chic velvet clutch, and you’ll be dressed to kill.

Pants, $713, from Equipment at NET-A-PORTER. Clutch, $508, from Tara Zadeh at NET-A-PORTER. Shoes, $55.90, from Zara. Necklace, $43.90, from Charles & Keith.

If you’re heading somewhere balmy and sunny for your year-end vacation, be as smoking hot as the weather there by pairing your LBD with statement accouterments. There’s no need to go overboard with the layering. Instead, exude delicate elegance with understated but stylish objects such as a pair of striking gold earrings, a multi-chain necklace, strappy brown sandals and a crossbody bag. Don’t forget to bring along a pair of shades.

Shoes, $49.90, from Charles & Keith. Bag, $99.90, from Zara. Hat, $36.90, from Topshop. Necklace, $390; and Earrings, $405, both from Isabel Marant. Sunglasses, $518, from Loewe.

You can still rock your polyester LBD in colder cities. The key is to dress it with thicker garments, such as wool or cashmere. Wear a turtleneck pullover underneath your black dress and wrap yourself in a double faced wool coat. Jazz it up further with a pair of standout knee-high boots. If it’s extra cold, remember to put on some thermal leggings (not pictured, but we recommend Heat Technology pieces from Uniqlo) to keep your lower regions warm.

Knit, $401, from Calvin Klein 205W39NYC. Boots, $299, from Mango. Coat, $249, from Uniqlo. Bag, $99.90; and Beret, $39.90, both from Zara.