This is an aside, but my gf finally quit smoking. Two things helped. First, this book . Second, she switched jobs and most people in her new office don't smoke. Maybe it's a good time to encourage him to find a new gig? Best of luck <3
For all those trying to stop smoking, read this book: Allen Carr's Easy Way To Stop Smoking https://toptalkedbooks.com/amzn/0615482155
Read this, seriously.
Allen Carr's Easy Way To Stop Smoking
My dad was a smoker since I was born (har har), and tried to quit several times. A few years ago, he read this book and it worked for him. He says he gave it to all his friends afterwards, swears by it now. I don't know if it'll work for you, but give it a try I guess?
There is an /r/stopsmoking sub that is helpful for people trying to quit cigarettes. Also recommended is Allan Carr's book Easy Way to Stop Smoking. https://toptalkedbooks.com/amzn/0615482155 Additionally I have read that increasing the fruit you eat helps reduce the cravings. Good luck! You can do this, I am several years tobacco free myself & it is great.
Here's a copy paste from stuff that helped me early in my recovery, in case you are looking for more concrete tips.
Best of luck to you in your journey of recovery. I believe you will find your way and trust you have the power within you to change. You really do deserve to be happy. You really are worth it.
Since you are fairly new to recovery here's a little info that has helped me through my journey. Go ahead and do some research for yourself about the positives of porn and masturbation. Question everything you read and you will soon realize that people out there are fooling themselves. They are addicted to a drug and are desperate to somehow justify their drug-use. People are willing to go to great lengths to explain their shitty habits. We are very protective of things that we know deep down are addictions. Here is a little reading material for you! Remember to never stop researching and exploring this addiction. It is cunning and the more you learn the better success you will have. Remember to take it all with a grain of salt. The important thing is that these resources will help you start to question your inner-addict.
http://www.reddit.com/r/NoFap/comments/2zrqrk/this_is_so_true_must_read/ (it's my own words, so I hope that doesn't come across as narcissistic. I just think thinking about these things is extremely important in early recovery)
This book is great for dealing with shame. It has helped me greatly with my own struggle to deal with my past and make peace with my mistakes and accepting myself as a person.
This book is not written for sex addiction, but it shows how recovery can be an extremely positive experience. I would definitely recommend reading it and substituting "porn and masturbation" for "nicotine."
There is a free PDF download on the website. I really like this book because it gives concrete strategies for overcoming porn and masturbation addiction. Read it all with a grain of salt. And approach everything in your initial recovery with skepticism.
I'm not a huge fan of Patrick Carnes because he seems to miss a basic idea about recovery that I think is important. But this book really is great for exploring your addiction. I would recommend it in small doses. It is highly interactive and it is sometimes very challenging to work with. This book is best used with the help of a therapist.