If you haven't already, ban smoking inside the house. From now on, make yourself and your partner smoke outside. This kind of "breaks" some habits (smoking first thing in the morning, smoking after a meal) and makes breaking more easier.
After a meal and first thing in the morning, try to force yourself to go an extra 30 min to an hour without allowing yourself a cigarette. The more "habits" you break, the easier it will become to cut back dramatically. When you are down to say... five cigarettes a day - imagine how much easier it will be to cut down to 2.. then 1... . then ... poof! No more.