You don't. This is something he has to do on his time by his terms. Even though you can buy cigeretts, look at them as a illegal drug and you are trying to stop useing. You know it is bad for you, the others around you, but you keep going back, your mind is weaker than your will. Deeep down you want to stop but you just can't imagine your life without that thing in your hand. You might even feel like you lost your hand if you don't have one, like something is really missing from you. Your habit doesn't nag you, tell you how bad it is for you and your family, it doesn't tell you how expensive it is. It is quiet and calming, there for you no matter what. It doesn't judge you for what you do, it accepts you for what you are.
That is how I felt ever time I would try to stop smoking. And it drove me nuts when people would tell me over and over how bad it was for me, my kids, blah blah blah. I knew all that stuff and I didn't need them harping in my ear about it either. I tried cold turkey, the gum, the patch, the zyban with and without my hubby that smoked too. We finially didn't quite till our insurance paid for Chantix. Even if your insurance won't pay for it, it is worth the out of pocket cost! My hubby and I stopped the first week on it because it made cigeretts taste something horrible! And the smell became unbearable too!! Oh and to smell menthol cigs wast the worst of all! I really felt like I turned green every time I was around someone that smoked!!! My hubby and I didn't even finish the first 6 week course of the meds and we are smoke free for 1 1/2 years now!! (2yrs come October) We went out and bought a camper with the $200+ we were spending a month on cigeretts!! I don't miss them, and yes, I do still think about lighting up when I first get in the car or on the phone, the triggers that used to cause me to smoke. But I have no desier to go back to them at all.
Just give your hubby time and some space. The more you nag, the less he is probably willing to give them up. Find out if your insurance covers Chantix and talk to him about try it.
Good luck!
S.