How do I give up smoking when my spouse still smokes?

If he's smoking and you happen to be around, I mean if it's by accident or what have you. Leave until he is done. Yeah smoking is tough to quit. But usually after the first week(or so I'm told) it gets easier then. My mil says that eating little candies help. Such as butterscotch candies and peppermints. But that's just her. Some people use gum. The only thing I can suggest if to keep busy.