For anyone looking to quit smoking I can't recommend e-cigarettes enough. As a very passionate former smoker I got off the habit pretty much accidentally and without even trying in a timeframe of about half a year. And it actually started with the intend to find a cheaper alternative to expensive cigarettes without any desire to quit.
The key is to steadily reduce the amount of nicotine in the liquid you're using. Once you aren't using nicotine any longer all that is left is the social ritual and habit of going out for a smoke, which isn't a very convincing reason after a while. Soon you'll forgot to take your e-cigarette with you one day - you'll use it less and less. Until it simply doesn't matter any longer.
The key is to steadily reduce the amount of nicotine in the liquid you're using. Once you aren't using nicotine any longer all that is left is the social ritual and habit of going out for a smoke, which isn't a very convincing reason after a while. Soon you'll forgot to take your e-cigarette with you one day - you'll use it less and less. Until it simply doesn't matter any longer.