Let everyone know that you quit. It doesn't just feel good, it keeps you on the right path.
There are quitting benefits only former smokers know. It feels good to tell people you quit smoking. Everyone knows how tough it can be and yet you did it. Maybe you can't put it on your job resume, but it shows that you're capable of doing something with a high degree of difficulty. Also, quitting tends to bring acquaintances, friends and your family closer to support and appreciate you. Those are the kinds of fringe benefits that can make the quitting experience even more worthwhile.