I quit mid nov using an e-cig, thought it was a really good way of doing it! You use it a lot in the first week or so but because it doesn't taste brilliant and you feel like an utter tit using it you naturally use it less and less, and because its in your pocket it there if you need it, but you don't feel the urge to use it, and that seems to help. Very phychological
Getting into some sort of exercise straight away helps and being in the right frame of mind too. ie don't say ' i'm trying to quit', say 'i have quit and don't want to smoke anymore'. Sounds bollox but it works! Apparently the physical addiction only lasts a few days, then its all mental.
You also realise how much you stank when you smell other smokers