I try to welcome the unexpected as part of the great adventure. Something to relish, a puzzle to solve, or an opportunity to practice wisdom and move on.
With a bit of luck, I get to choose whether to make the unwelcome a positive experience, or to allow it to suck the energy out of the day. Maybe there's humor to find, lessons to learn, or a diversion to spice up an otherwise bland plan.
When our camera was stolen from our daypack in India, we both felt depressed for the rest of the morning. We had lost pictures of hikes 11,000 feet up in the Himalayas and walks around the Taj Mahal.
This led me to a solution that would prevent the loss of so many pictures again.