I love perfect days on vacation. I’ve had many. Blissful, sunny days strolling along the Seine. Days spent wandering through Italian streets, stuffing myself with pasta and gelato. Days driving through the Irish countryside with picture-perfect rolling hills scattered with sheep and castle ruins on the horizon. But what about the non-perfect days? What about the terrible, horrible, no good, very bad days? Like the day you’re in Barcelona and your purse is stolen and you’re out of cash? Or the day you’re totally lost and you get a ticket from a German police officer for breaking laws you didn’t…