Quitting smoking is easy. I've done it a thousand times.

It's easy to quit smoking. I've done it hundreds of times.

Giving up smoking is the easiest thing in the world. I know because I've done it thousands of times.

It has always been my rule never to smoke when asleep, and never to refrain when awake

Giving up smoking is the easiest thing in the world. I know because I've done it thousands of times.

Smoking is bad for you. You don't have to take my word for that. Just look a package of cigarettes and see what it says. We don't regard smoking as an acceptable method of delivery for a medicine.