I've traveled to a lot of countries on my own, and I have a few must-pack travel essentials I take on every trip. Nicole Jordan I've traveled to over 40 countries in the past decade and have explored many of them solo. I fit everything I need in a 55-liter backpack, which I usually bring as my carry-on on planes. Since I often travel alone, I always pack a personalized first-aid kit and a satellite device. Over the past decade, I've had the opportunity to visit more than 40 countries, at least