As anyone trying to give up cigarettes will tell you, when the craving for nicotine hits, it's hard to ignore. That's why the golden rule for quitting any habit is this: don't try to resist the craving; redirect it. In other words, you should keep the same cues and rewards but change the routine that occurs due to the craving.
Several studies on former smokers have shown that, by identifying the cues and rewards around their smoking habit and replacing the routine with one that has a similar reward, such as doing some push-ups, eating a piece of Nicorette, or simply relaxing for a few minutes, the chances of staying smoke-free increases significantly.
One organization that uses this method effectively is Alcoholics Anonymous (AA), which may have helped as many as ten million alcoholics achieve sobriety.
AA asks participants to list what exactly they crave from drinking. Usually, relaxation and companionship are far more important than actual intoxication. AA then provides new routines that address those cravings, such as going to meetings and talking to sponsors for companionship. The idea is to replace drinking with something less harmful.
However, research on AA members shows that, although this method works well in general, it alone is not enough. In the early 2000s, a group of researchers at California's Alcohol Research Group noticed a distinct pattern in their interviews with AA members. A frequent response was that the habit-replacement method worked wonders, but as soon as a stressful event occurred, the old habit was simply too strong to resist, no matter how long the respondent had been in the program.
For example, one recovering alcoholic had been sober for years when his mother called to say she had cancer. After hanging up, he left work and went directly to a bar and then, in his own words, was "pretty much drunk for the next two years."
Further research has indicated that those who resist relapse and remain sober often rely on belief. This is why spirituality and God feature prominently in AA philosophy. But it's not necessarily the religious component itself that helps people stay sober. Believing in God also helps participants believe in the possibility of change for themselves, which makes them stronger in the face of stressful life events.