One of my best friends is bag designer , who not only makes the most genius travel-friendly makeup cases and toiletry kits, but is a seriously savvy frequent flyer, herself, constantly crisscrossing the globe and sharing all of her insider-y travel tips on her blog . I've been all over the place with Stephanie, so I can attest to her expert packing skills (she took a single carry-on for a week-long trip to London and Capri!) and her amazing ability to sniff out the coolest places in town (like Lamucca in Madrid!). Over the years, she's taught me a few things--like how to make the most out of missing a connecting flight--and, of course, provided me with her multi-purpose bags to keep my life on the road in meticulous order. She asked me to share some of my travel customs, which you can check out .