The average traveler will spend 15 years of life waiting in line. OK, I made up that statistic—but it feels true. Whether standing in a long customs queue or attempting to visit the Louvre on a summer Saturday, we globetrotters spend way too much time lingering in line. But there's a better way to see the world: Live life in the fast lane. Here are 10 smart tricks for skipping lines at airports, attractions, cruise terminals, car-rental counters, and hotels.