Andreea Diaconu travels a lot. “It's about three to four times a week,” she says. “Usually Paris to New York, then back to London, then Paris again. St. Barths, Antigua, or Anguilla for beach shoots. Then Milan or LA—and it always changes with the season,” Ah, the perks of being a model in more campaigns than you can shake a boarding pass at. As such, she's developed a carry-on strategy that's more of a science than the haphazard “anything that'll fit in this Ziploc"-type deal. Here are her rules for fitting three days into one bag:

Embrace being basic
"I take two button-downs, a sweater, three basic white shirts, three black ones*, Acquaverde or Frame jeans, and then my running and yoga stuff—black leggings and a Billabong tank. I have the day-of-the-week underwear from Stella McCartney and make sure to have socks for the plane. And always flats, like Birkenstocks or Céline. If I'm going somewhere summery, I take a dress, like this Tallow one, and a Philip Lim bandeau bikini. That's it,”

Finally sample those samples
"I try out all of my samples when I'm traveling—anything that's little. There's this tin of Beautified Curls Shea Butter Sculpting Wax for Curly to Kinky Hair and these tiny bottles of Tracie Martyn Absolute Purity Toner and Lotus Sculpt Activator. I got them a long time ago and I keep refilling them,”

Take advantage of the downtime
"When I'm on the plane, I use this SK-II Facial Treatment Mask once or twice a month—it’s very hydrating. I’ll put it on and look like a freak: It’s a conversation starter. People are like, 'What the hell are you doing?'"

—as told to ITG

Andreea Diaconu photographed in her home in New York by Tom Newton.