Knowledge can help a lot.

Knowing about the dopamie system in the brain, the feel good nero-chemical, can help a lot. Dopamine is related to many things in the body. Nicotine triggers dopamine, but it isn't the actual nicotine that you need... it's the dopamine. Dopamine occurs naturally in the body anyway, and can be triggered by good food, exersice, sleep etc.. Just re-learn how to feel good without a smoke. Eat good food, exercise, anything. Or the fact that people's (human's) lungs are over-built, have a larger capasity than we (modern day people perhaps) need. It does make it easier. I'll try to describe what I mean. The lungs are overbuilt in people, meaning that the capasity is large. If you were flatten out all of the surface area of the alveoli, of an average adult, the alveoli is where the gas exchange happens, the surface area of that is about the size of a tennis court. So we have more lungs than we need, which is why it might feel ok and no problems for a long time of smoking. Knowledge is power.