How can you help your spouse or partner cut the bad habits out of his life,like smoking, drinking alcohol and other more ?

Its experience for everyone on their own life, until they focus on the positive and negative sides. Decision making side should be bold enough to handle the correct descision. You can explain the benifits and harm that bad habit is doing to person along with the impact that it is doing on the body. Once they realise that its not going to be good for them they can start avoiding it