You define a good flight by negatives: you didnt get hijacked, you didnt crash, you didnt throw up, you werent late, you werent nauseated by the food. So you are grateful. – Paul Theroux
A travel book is about someone who goes somewhere, travels on the ground, sees something and spends quite a lot of time doing it, and has a hard time, and then comes back and writes about it. Its not about inventing. – Paul Theroux