Laziness works. And the simple way to incorporate its health benefits into your life is simply to take a nap.

Surely, anyway, a working day of eight or nine hours which is not split by a nap is simply too much for a human being to take, day in, day out, and particularly so in hot weather.

When stuck years ago in a job I hated, my only friend was the public bench. As the tedious mornings dragged on, how I would long for the lunch hour, when I would be able to escape the torture of the office and stroll over to the churchyard and into the comforting wooden embrace of one of its benches.

Deleting 200 spams a day is a drag. And I was checking my email constantly, rather than getting on with my real work, which is reading and writing. Email was becoming a distraction, a burden rather than a liberation.

One aspect of fast London life I have never understood, for example, is the custom of the gym. Why do people go to gyms?

Embrace the faff. Stare out of the window. Bend paperclips. Stand in the middle of the room trying to remember what you came downstairs for. Pace. Drum your fingertips. Move papers around. Hum. Look at the garden.

To me there is no more depressing sight than a five-year-old staring at a screen, unsmiling, mouse in hand. Besides whatever dreadful things this prolonged exposure to screens is doing to their brains, computer games tend to be solitary affairs, and produce little laughter.