What I found irritating is the way he keeps saying that quitting smoking is 'ridiculously easy'. It is not. Carr advises the reader to keep smoking until the book is finished, then pick a Quit Day. He would not have approved of my reading his book with a nicotine patch stuck to my ribcage. I will return to Carr's book from time to time, but I give you this piece of advice that helped me.
Nicotine leaves the body quickly, which is why the urge to light up again also returns quickly.
The good news it that you can flush the nicotine from your body quickly, some say in as little as five days, more likely 10 days to two weeks. When the nicotine is flushed from the body, the physical addiction is over. It's almost fun those first few days, doing battle with the enemy. You're proud of yourself, friends give you sweet support, you stop stinking, your face looks less grey, food tastes better. The novelty of quitting wears off just when you've beaten the physical addiction.