Business Insider's reporter travels solo on overnight trains, cruise ships, and long-haul flights. Joey Hadden/Business Insider Solo travel can feel daunting, but it can also be empowering. Traveling long distances by plane, train, and ship has taught me lessons on how to travel alone. Here's what I've learned, from combating loneliness to making the most of your solo trip. I wasn't always a solo traveler. In fact, there was a time when I wouldn't have even considered it. My college years livi