On unexpected situations
When you suddenly find yourself alone in an unfamiliar place with no plan because your travel buddy had to fly back home on an emergency and he was the one doing all the planning: Keep Calm and Wander On. Happened to me in Manila. I had left all the planning to Brennan of Baktin Corporation telling him I would follow him wherever he went. But on the third day of the trip, he had to cut his trip short, and I had no idea where I would go for the 1.5 days left. Thank God for data plans, Google, and Grab.
When you are stuck in a train in the middle of nowhere because they have suspended train operations due to heavy rain: Keep Calm and Weigh Your Options. Happened to a friend who was traveling in Japan. She was a third of the way to Shimosuwa from Tokyo, a 3-hour train ride, when the trains were stopped. She waited and it was eventually announced that trains wouldn't resume operation to where she was going. Luckily she had a friend living in a nearby prefecture who took her in for the night.