Fitting 10 days of clothes for rain, hiking, and Michelin restaurants into a 22-inch carry-on forced me to pack ruthlessly, and to distill my packing thoughts into 5 packing pro tips. Flying to Hungary right after a cycling accident reminded me of the hassles of traveling on the injured reserve list. All this and listener comments on EU mobile regulations, travel apps on smartphones, and the need for Atlanta baggage X-ray ninja skills