I stopped initially using electronic cigarettes for a couple of weeks, switched to patches for another week or so and since then just a few drags of the e cig every 5 or 6 hours. I only have a few cartridges left so that will be it once they are gone.
I know some people think that using e cigs isn't stopping, but its the same principle as patches or gum, you use them to wean yourself of tobacco.