My stepmum has cut down (or possibly out) using ecigs... now she was a women that would kill anyone for even suggesting her cutting down (she's got two kids who tried persuading her off them) but she's quite content with her ecig...
My stepdad quit when he was forty, cold turkey. On his bedside he had a pack of cigs and a pack of mints. If he wanted a cig, he knew they were there so could have one if he truly couldn't cope. However, he always had a mint instead and that helped the cravings pass.