To be truthful, I'm not really sure I've gone cold turkey yet.
He quit back in 2005 by going cold turkey.
Many heavy drinkers fail to quit cold turkey but do much better when they taper gradually, or even learn to moderate their drinking.
Taper off your caffeine intake gently; it's a drug that can cause withdrawal side effects such as severe headache if you stop it cold turkey.
These celebrities who quit smoking used methods from hypnosis to nicotine gum to going cold turkey.