the above is all very insperational stuff and i can add to it by saying 12 months ago i was a heavy drinking,smoking 15 stone taxi driver !!
I have changed my job to a far more physical one and started cycling stopped smoking [my method for that was promise my self one in half an hour time and hopefuly the craving has past and so on ]cut down on drinking by about 80 % that was easy because if i drink heavy it directly effects my cycling the next day . not changed my diet and im now about 12 stone