To quit the tobacco and nicotine smoking, Electronic Cigarette can be used with the four basic tastes such as the high, medium, low and zero nicotine thickness cartridges to meet the requirements of different smokers. The following Four Steps procedure is designed specially for smokers who is willing to quit reduce their nicotine reduction unconsciously by decreasing the inhaled nicotine volume. Four Steps Procedure: Step 1: Starting with high nicotine density cartridge following normal smoking habit; Step 2: Then switch to medium nicotine density cartridge following normal smoking habit;