We're forever mystified by travelers who manage to pull together effortlessly chic ensembles absent a legion of heavy luggage. What's their secret? How do they fit so much style into a sleek little 20-inch carry-on bag? To find out, we asked some of the most well-dressed (and well-traveled) people around—fashion bloggers and editors—for a little help, please. Discover the ingenious packing methods of 11 well-dressed style experts.