The Fashion Commandments

1. HONOR THY GRANNY

We love the splashy vintage prints in super-chic swim designer Zimmermann's new clothing line. Dresses, $716, Zimmermann at Diavolina, (310) 550-1341; $585, Zimmermann, shopbop.com.

2. ACCESSORIZE COYLY

Be the first to carry Viktor & Rolf's new handbags with metal chains — perfectly girly, with a little edge for good measure. Pink bag, $1650, black bag, $2275, Viktor & Rolf at Iris; (212) 645-0950.

3. INVEST IN FASHION HEIRLOOMS

Balenciaga's been on a roll with clothes, bags, shoes. Why not snag a pair of sunglasses from its new line of iconic, retro-inspired designs? Highly doubtful you'll regret it. Sunglasses, $420 and $330, Balenciaga; solsticestores.com for stores.

4. STAY IN THE KNOW

. . . and fall for new designer Keller. With their unexpected shapes and reasonable price tags, get used to hearing, "Where'd you score that?" Jacket, $345, jeans, $198, Keller at In God We Trust; (718) 388-2012.