I started to smoke when I was 15 or 16 years old, and quickly became a pretty heavy smoker: more than a pack per day. I was smoking usually the cheapest cigarettes. Tobacco products are generally cheap in my home country, at that time it was something like a dollar per pack. When I came to the US, I realised that this habit costs me significant amount of money, as I was working on a minimal wage at this period of time. So, I prefered to quit by radually decreasing the number of cigarettes per day, finally coming to zero. I did not smoke for five years since then, and went back to it for a short period of time (a few weeks, literally). However, that did not make me a habituala smoker again. Right now, I am not smoking at all (means under no circumstances) for 1.5 years.