In these moments, though, I try to stay Zen by looking out for the people who always cheer me up. So anyone eating a banana, for example. For some reason, I always think well of banana eaters. And rollerbladers. And cheerful, chubby men in tight Breton stripes. Finally, crossing the bridge over the Thames, I always look for the people peering over the side and clearly thinking the same thing as me: could I jump onto the roof of that passing Thames barge? You can always spot them, pausing and looking down thoughtfully, Bourne-style action sequences flashing through their heads. It’s a heartening, cheering sight. Thank you.