Jenna Lyons's Must Haves: From Her Go-To Red Lip to Cozy Socks

"I have a thing. I cannot stand my feet being cold, and airplanes are notoriously freezing. These Brochu Walker Ribbed Cashmere Socks ($88) are lightweight but keep my feet toasty," Lyons says. These socks are made from 100 percent cashmere with rib and jersey knit stitching, which adds a soft, cozy feel. The brand notes that you can wear them scrunched down or folded over. It comes in an ivory cream and a heather gray.

Pro Tip: Lyons also recommends packing a pair of underwear and other day-of necessities in your carry-on or personal item bag in case your luggage gets lost.