When I’m traveling, I aim to carry my luggage on board the plane. I was not always like this (just ask my beauty editor friend Didi who, for years, counted on me to pack the entire contents of my bathroom vanity when we went on press trips, enabling her to bring like a toothbrush and then borrow the rest). But, after losing my luggage too many times, and nearly missing flights because I was waiting in miles-long lines to check my bag, I finally learned how to minimize my beauty gear. My secret? Primp in advance; here's my strategy: