I have a couple of friends who have been trying to quit smoking. For the 5h time. During the last year. Their quitting smoking is accompanied by nervous breakdowns, outbursts of anger, strange desires, like to put on old German uniforms or go marching on the street. To cut a long story short, these guys really need a systematic approach. So they asked me to write them tips how to quit smoking. To tell the truth, this is the same as to ask a penguin to compose a treatise about long flights, because I have never smoked. But I can’t refuse my friends.